How many stamps to mail large envelope

In the United States the popular business envelope is the standard #10 Envelope. With options such as Square Flap, Policy and commercial flap - it has become popular for both commercial and social designs. The #10 envelope that has a square flap can create a unique look to the "so called" common envelope. Shop for Business Envelopes

How many stamps to mail large envelope. 1st Class Large Envelope, 11 oz. $3.79. 1st Class Large Envelope, 12 oz. $4.03. 1st Class Large Envelope, 13 oz. $4.27. The USPS does not offer sheets of postage stamps at these rates. You'll either need to visit the USPS to print the specific postage, print them at home with a service such as Stamps.com, or use multiple postage stamps.

This means that as long as your tax return and any additional documents fit within the weight and size restrictions specified by the postal service for letter-sized mail, you can use standard postage rates. 2. Number of Pages: The number of pages in your tax return can also affect the amount of postage required.

Below are the rates for standard envelopes for normal envelopes like a letter or birthday card, no bigger than 11.5" x 6+⅛" (see envelope requirements). The postal service refers to large envelopes as 'flats.' — View rates for flats. 1 ounce ($1.55) One Global Forever stamp ($1.55)What Are the Costs of Mailing a Large Envelope? The cost of a stamp for large envelopes is $0.70. If the mail you are sending is large enough to qualify as an envelope, it will only cost you postage. Large envelopes have an 11 ½ length, 6⅛" height, and ¼" thickness.Oversized postcards need letter stamps, which start at $0.68. Large Envelopes. Large envelopes (flats) start at $1.39. Weight, Size, & Shape Requirements. Maximum weight for First-Class Mail letters is 3.5 oz; for large First-Class Mail envelopes, the maximum weight is 13 oz.2 X-Large (1) 2X-Large (2) 3X-Large (2) One Size (2) X-Small (2) XXX-Large (1) Show More. Stamp Shape ... Standard Envelope (27) Priority Mail (10) Priority Mail Express (5) International (3) Postcard (2) Non-Machineable (1) Show More. ... Winter Woodland Animals Framed Stamps - Owl. Set of 1. 9.5"(W) x 11.5"(H) $29.95 Save Manatees First Day ...Large Envelope Properties. Select the one that most represents your mail piece. None of the following. is Rigid - does not bend easily. is NOT Rectangular or Square. contains items that cause more than 1/4 inch variation in thickness.TIP: Pay for Priority Mail Express ® or Priority Mail ® service and get free envelopes that are large enough to hold your application. Order easily online: Priority Mail Express Flat Rate Envelope or Priority Mail Flat Rate Envelope. Address the envelope to the location for your state. See page 2 of your DS-82 form. How to Renew a Passport ...How many stamps do I need to mail a 2022 manila envelope? › If your letter is a standard-sized envelope and weighs 3.5 ounces or less, you will need one stamp. Large envelopes. This includes 9x12, legal, and manila envelopes, Two stamps are needed for the first ounce, and postage will be an additional $0.20 cents after. International mail.

TIP: Pay for Priority Mail Express ® or Priority Mail ® service and get free envelopes that are large enough to hold your application. Order easily online: Priority Mail Express Flat Rate Envelope or Priority Mail Flat Rate Envelope. Address the envelope to the location for your state. See page 2 of your DS-82 form. How to Renew a Passport ...Large Parcel. Max. 1500mm (L) - total length, width and depth less than 3m. Find out how many stamps you'll need to post your a5 envelope second class through Royal Mail within the UK.Large Envelope Properties. Select the one that most represents your mail piece. None of the following. is Rigid - does not bend easily. is NOT Rectangular or Square. contains items that cause more than 1/4 inch variation in thickness.The First-Class postage scale for flats as of Jan. 30, 2020, starts at $1.00 for a 1 ounce mailing and maxes out at $3.40 for 13 ounces, the top weight allowed for first class mail. If you are using a regular First-Class stamp, its value is 55 cents, so it would take two stamps to ship at a 1 ounce weight and seven standard stamps for a 13 ...When sending out cards such as a birthday card or greeting card, it is important to note that size and weight both play a large factor in determining how many stamps must be used. When mailing through USPS the average-sized card can be sent out with one $0.55 First Class stamp or a forever stamp. Video unavailable. This video is unavailable.The number of postage stamps required depends upon the weight of the item which you are sending. Weight & Type. No Of Stamps Required. 0 – 100g (Letter) 1 First Class & 1 Second Class. 0 – 100g (Large Letter) 2 …How Many Stamps Should I Put on a 9×12 Envelope that Weighs 4 oz? The United States Postal Service classifies a 9×12 envelope as a flat. The postage required for mailing a 1-ounce flat is $1.20 for the first ounce and $0.25 for each additional ounce. So, the total postage required to mail a 4-ounce envelope will be around $1.95.Calculate Postcard price. View Flat Rate Envelopes. View Flat Rate Boxes. Calculate price based on Shape and Size.

Under "Letter Details", select whether you are sending a Regular or Large envelope. Choose mm (millimeters) or in. (inches) to see the maximum size for each type of envelope. Select a weight. Does your item weigh more than 500 g (1.1 lb.)? Select "My document weighs more than 500 g" and enter the exact weight of your letter or document.The actual cost of mailing a 9×12 envelope will depend on several factors. One of these factors is its weight. Mail costs start at $1.00, but it increases by $0.21 for every additional ounce. The USPS considers the 9×12 envelope as a large envelope. As such, its mailing cost is higher than regular letter envelopes.Small Parcel. Max. 450mm (L) x 350mm (W)x 160mm (D) Weight. First Class. 0 - 1000g. 6 stamps. 1001 - 2000g. 8 stamps. Over 2000g.Whether you need stamps for personal or business use, you can find a variety of Forever Stamps on the USPS.com Postal Store. Forever Stamps are always equal to the current First-Class Mail 1-ounce price and can be used for any domestic mailing. Browse our selection of stamps featuring historical figures, patriotic themes, nature, art, and more. Send 1 oz letters or postcards around the world with one Global Forever ® stamp, which currently costs $1.55 and never expires, even if the postage price goes up. For large envelopes (flats) up to 15.994 oz, postage prices vary based on weight and destination. Buy International Stamps First-Class Mail International Prices

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A4 Letter. Max. 353mm (L) x 250mm (W)x 25mm (D) Weight. First Class. Second Class. 0 - 100g. 2 stamps. 2 stamps. 101 - 250g.Some oversized and overweight envelopes may require extra postage due to the extra service needed to be done by postal machines to sort the mail. For example, square envelopes require additional postage. If your envelope is 3.5 inches or less in height, 5 inches or less in length, and 0.007 inches or less in thickness. Then simply use a forever ...Depends. You cannot use standard USPS stamps. If you are sending a 1 oz letter than you will need just One Global Forever® Stamp. Important things to remember about envelope rates: Rates per Oz (as of 1/26/2014) 1 oz $0.49. 2 ounces $0.67. 3 ounces $0.87. 3.5 oz $1.08.Express 24 from £9.70. Express AM from £13.70. Express 48 from £9.20. Express 48large from £44.20. Online prices shown. Send an item with Parcelforce. View our Parcelforce price guide.Retail Calculator. Business Calculator. Customs Form Indicator. Country Max Limits and Price Groups. Zone Chart. Pricing. Price Charts HTML. Price Charts PDF. Postal Explorer.

Letters can be mailed using one single U.S.A. First-Class 49 cent stamp per envelope, according to the United States Postal Service. It’s the amount of postage that matters, not th...Large Parcel. Max. 1500mm (L) - total length, width and depth less than 3m. Find out how many stamps you'll need to post your a5 envelope first class through Royal Mail within the UK. Learn about the size, weight, shape, and color requirements for letters and large envelopes mailed with USPS. You can attach stamps to large envelopes being sent through First-Class Mail® as long as you’ve met USPS’s weight restrictions. It costs $1.39 to send the first ounce of a large …When sending out cards such as a birthday card or greeting card, it is important to note that size and weight both play a large factor in determining how many stamps must be used. When mailing through USPS the average-sized card can be sent out with one $0.55 First Class stamp or a forever stamp. Video unavailable. This video is unavailable. Learn about the size, weight, shape, and color requirements for letters and large envelopes mailed with USPS. Large envelopes have large sizes compared to standard envelopes, so we need extra Stamps for their postage. For a Large Envelope with sizes up to 1 oz or ounce, you need two Forever Stamps. If the weight of Large envelopes exceeds 1 ounce, then you need one additional Stamps for each ounce. Note the maximum weight of a Large Envelope can be up ...6. Next, find the "What are you mailing?" section. Click on the drop-down menu and select "Large Envelopes/Small Packages." 7. A new section titled "Choose a Service Type" will appear. Scroll down to this section and click on the "Learn More" link next to "Media Mail." 8.The current cost of a domestic Forever stamp is $0.58, which is the rate for a 1 oz domestic letter. Additional ounce stamps are $0.48 each. So for example, if you wanted to use domestic stamps to mail a 1 ounce letter to Canada, you would need: 2 Forever stamps (2 x $0.58 = $1.16) 1 additional ounce stamp ($0.48) Total postage of $1.64.In 2024, a new Floral Geometry stamp, denominated at $1, will be available for purchase. The stamp will complement the similarly designed $2 and $5 stamps issued in 2022 and the $10 stamp issued in 2023. The stamps lend an elegant and contemporary appearance to packages, large envelopes and other mailings.

If your letter is a standard-sized envelope and weighs 3.5 ounces or less, you will need one stamp. Large envelopes. This includes 9x12, legal, and manila envelopes, Two …

Flats // Large Envelopes. The baseline postage rate to mail a Flat/Large Envelope has increased from $1.35 to $1.39 in postage, but the price for each additional ounce also stayed the same at 24 cents per additional ounce. This means that a flat that weighs 1.01 ounces, for example, will now require $1.63 in postage.In February 2022 Royal Mail introduced barcodes to stamps. Each barcode is unique and an integral part of the stamp, so when using these new stamps you must keep the barcode attached otherwise they are invalid ... Large Letter. 35.3cm long, 25cm wide, 2.5cm thick, Up to 100g. £2.10 . 2nd Class. Format and maximum size Price; Letter. 24cm long ...Large Envelope Properties. Select the one that most represents your mail piece. None of the following. is Rigid - does not bend easily. is NOT Rectangular or Square. contains items that cause more than 1/4 inch variation in thickness. Send 1 oz letters or postcards around the world with one Global Forever ® stamp, which currently costs $1.55 and never expires, even if the postage price goes up. For large envelopes (flats) up to 15.994 oz, postage prices vary based on weight and destination. Buy International Stamps First-Class Mail International Prices Large Parcel. Max. 1500mm (L) - total length, width and depth less than 3m. Find out how many stamps you'll need to post your a4 letter through Royal Mail within the UK. To be eligible for mailing at the price for letters, a piece must be: Rectangular. At least 3-1/2 inches high x 5 inches long x 0.007 inch thick. No more than 6-1/8 inches high x 11-1/2 inches long x 1/4 inch thick. First-Class Mail letters that have one or more nonmachinable characteristics will pay a nonmachinable surcharge. APO Shipping Cost and Postage Required. You only have to provide standard domestic postage on mail going to an APO or FPO addresses. If you pay $0.47 for a stamp to mail something within the continental United States, it only costs $0.47 to mail it overseas as long as you have an APO/FPO/DPO address and associated ZIP code.The 2022 postage rate for First-Class Mail flat or large envelopes start at $1.20. You can put a maximum weight of 13oz of content inside a 9×12-inch envelope. Multiply the additional ounces by $0.24 to get the total cost. Sometimes the distance affects the prices of certain types of mail.Indices Commodities Currencies Stocks

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1st Class Large Envelope, 11 oz. $3.79. 1st Class Large Envelope, 12 oz. $4.03. 1st Class Large Envelope, 13 oz. $4.27. The USPS does not offer sheets of postage stamps at these rates. You'll either need to visit the USPS to print the specific postage, print them at home with a service such as Stamps.com, or use multiple postage stamps.How Many Stamps Do I Need for a Large Envelope? Determining the number of stamps required for a large envelope can be confusing, as it depends on various factors, such …Help save the post office and put your pet on a stamp. The United States Postal Service (USPS) is in trouble. Now that companies—and everyone else, really—is relying on email inste...Large Parcel. Max. 1500mm (L) - total length, width and depth less than 3m. Find out how many stamps you'll need to post your cd through Royal Mail within the UK.How many stamps will you need to mail a 3.4 oz padded envelope from 92377 to 66217? how many stamps for a 3.4oz envelope. ... The current rate as of 2016 for an 11 ounce large envelope is $3.18.USPS has recently increased the price of Forever Stamp from $0.58 to $0.60. If the weight of 6×9 increases then you will require an additional Stamp for each ounce. Therefore if the weight of your 6×9 envelope is more than 1 ounce but up to 2 ounces then you will need 1 Forever Stamp and 1 additional Stamp which will cost you $0.60+$0.20=$0.80.Yes, the Post Office Will Still Deliver Your Mail-In Ballot Without a Stamp 2 minute read United States Postal Service (USPS) mailman Mike Micali makes deliveries in Flemington, New Jersey, U.S ...The First-Class postage scale for flats as of Jan. 30, 2020, starts at $1.00 for a 1 ounce mailing and maxes out at $3.40 for 13 ounces, the top weight allowed for first class mail. If you are using a regular First-Class stamp, its value is 55 cents, so it would take two stamps to ship at a 1 ounce weight and seven standard stamps for a 13 ...First-Class Mail International for Large Envelopes & Flats containing merchandise is no longer offered directly from the USPS. However, Stamps.com continues to offer this service for items weighing up to 4 lbs, with a value of up to $400.00. When you select First-Class Mail International Large Envelope/Flat, you will receive a Global Advantage Program label with both our postal processing ... You can definitely mail it using only stamps. Tracking gives a nice level of comfort, but if your mail gets lost, it will be lost tracking or not. If you are mailing it in a large manilla-type envelope, you will need at least 3 or 4 stamps. Large Parcel. Max. 1500mm (L) - total length, width and depth less than 3m. Find out how many stamps you'll need to post your letter through Royal Mail within the UK. ….

How Shape and Size Affect Prices. Different postage prices apply to postcards, letters , large envelopes (flats), and parcels . In general, the bigger your mailpiece, the more it will cost to mail. In First-Class Mail, postcards cost less than letters. Letter size mail costs less than flat-size mail. Retail Calculator. Business Calculator. Customs Form Indicator. Country Max Limits and Price Groups. Zone Chart. Pricing. Price Charts HTML. Price Charts PDF. Postal Explorer. Below are the rates for standard envelopes for normal envelopes like a letter or birthday card, no bigger than 11.5" x 6+⅛" (see envelope requirements). The postal service refers to large envelopes as 'flats.' — View rates for flats. 1 ounce ($1.55) One Global Forever stamp ($1.55)6. For mailable items up to 70 lbs. Expected delivery in 2-5 days. Packages going to certain places (including Alaska, Hawaii, and offshore destinations), or containing hazardous materials or live animals may receive slower service. Back ^. Send mail and packages with USPS online shipping options. Choose your mail service by delivery speed ... Retail Calculator. Business Calculator. Customs Form Indicator. Country Max Limits and Price Groups. Zone Chart. Pricing. Price Charts HTML. Price Charts PDF. Postal Explorer. Due to the postal machines that sort the mail, the envelope size may require additional postage. For example, a square envelope requires additional postage. To meet the standard envelope requirements for using only one Forever Stamp, the envelope needs to be a minimum of 3.5 inches in height by 5 inches in length and the thickness must be a ...The Postal Service developed the Forever Stamp for consumers ease of use during price changes. Forever Stamps are available for purchase at post offices nationwide, online at usps.com, and by phone at 1-800-STAMP-24 (1-800-782-6724). They are sold in sheets and booklets of 20. Customers can use Forever Stamps for international mail, but since ...Back 1-4 Cent Vintage Stamps 5-19 Cent Vintage Stamps 20-30 Cent Vintage Stamps 31+ Cent Vintage Stamps Vintage Holiday Postage Vintage Christmas Seals ... Envelope Size: For your envelopes to qualify as a “Letter”, ... First-Class Mail letter: $0.15. First-Class Package Service parcel: $0.20. First-Class Mail International letter: $0.21 ...In general, the bigger your mailpiece, the more it will cost to mail. How many stamps do I need to mail a manila envelope? How many forever stamps for a manila envelope. The manila envelope is a large envelope and the postage required is $1.00 for the first ounce and $0.21 for each additional ounce.A global forever and a regular forever stamp would accomplish the goals. Make sure there's no objects in the envelope; those have to go in parcels so they can check the electronic customs form in the destination country. What kingu said - a global to get it overseas and a forever for the additional half ounce - if its an ounce or more I ... How many stamps to mail large envelope, I did this last week, I posted off a 30 odd page A4 contract. It cost me £1.26 and the guy at the post office stuck on a 200g large letter first class stamp. So look at the weight and the cost of sending large letters on the post office site. Or better still just go to the post office and let them weigh it. 3., Hi all, I don't normally send large envelopes through the mail so I thought I should ask how many stamps I should use. I don't know the weight of the parcel, just that it's a packet of about 11 pages (standard printer paper, if that matters) being sent in a standard store-bought manila envelope. I read online somewhere that 2-3 would work ..., Glad you asked. The 13-Ounce Mail Rule requires that any mail piece weighing over 13 ounces that is mailed with postage stamps has to be presented in person to a USPS employee at the Post Office. Since postage stamps are untrackable, presenting the mail piece to a postal employee serves as a security measure to keep the public, customers ..., The envelope needs to be at least 5 inches by 3.5 inches but not bigger than 11.5 inches by 6.125 inches, and no thicker than ¼ inches. It needs to have a uniform thickness. It must …, Standard Metric. What is the weight of your mail piece? Pounds. Ounces. Please select from the following options. View Dimensions. Letter. Large Envelope. Package. Large Package. Any dimension over 12 inches (30.48 cm), The 2022 postage rate for First-Class Mail flat or large envelopes start at $1.20. You can put a maximum weight of 13oz of content inside a 9×12-inch envelope. Multiply the additional ounces by $0.24 to get the total cost. Sometimes the distance affects the prices of certain types of mail., Global forever stamps went from $1.15 to $1.20. Rates on additional ounces for flats (large envelopes) went up by $0.05 per additional ounce for domestic flats and changed for international flats as well. Additional ounces for all international first-class mail changed with the base increase from $1.15 to $1.20. Sending Large Envelopes (Flats ..., When not sent using certified mail envelopes or labels, you can still create the envelope with Stamps.com, but you must manually fill out and attach the USPS Certified Mail form to the mailpiece. If you require a return receipt, you'll also need to hand directly to a postal employee. Both processes are explained in the sections below., The number of postage stamps required depends upon the weight of the item which you are sending. Weight & Type. No Of Stamps Required. 0 - 100g (Letter) 1 First Class & 1 Second Class. 0 - 100g (Large Letter) 2 First Class & 2 Second Class. 101 - 250g (Large Letter) 2 First Class & 3 Second Class., How Many Stamps To Ship a USPS Bubble Mailer. This depends on several factors. If you'd like to use stamps to ship your bubble mailer up to 4 ounces through USPS First Class, it will cost around $3.74. This will take 7 forever stamps ($0.55 per stamp) to ship your bubble mailer., Want to know how many stamps you need to post your Large Envelope through Royal Mail within the UK? This How Many Stamps page has the answer! The table below tells you how many stamps you need to post a Large Envelope... Large Envelope. Max. 353mm (L) x 250mm (W) x 25mm (D) Weight. First Class Second Class; 0 - 100g: 2 stamps: 2 stamps: 101 ..., We explain how many stamps you need to send a letter, package, or other type of mail. Find pricing and more inside. The cost of mailing depends on the size, weight, and sometimes t..., 4. Affix the Postage Stamps. Place the postage stamps on the upper right corner of the envelope. When more than one stamp is required, begin placing the stamps in the uppermost right corner and place additional stamps in a line across the top of the envelope right next to each other. Stop placing stamps when you are about 2 inches away from the ..., ShipStation offers affordable USPS postage thanks to our close relationship with USPS postage provider Stamps.com. These rates do not require you to ship a certain volume of shipments. ... USPS First Class Mail also supports letters, envelopes, thick envelops, flat rate envelopes, and postcards. ... USPS First Class Large Envelopes and Flats ..., These packs are 25, 100, 250, 500, and 1000. Manila envelope comes in small, medium, and large sizes. The larger sizes are 6×9, 9×12, and 10×13. The manila envelope of sizes 9×12 and 10×13 can store and mailed flat without making creases. While the 6×9 envelope requires a single fold to meet the standard document size that is (8 1/2 x 11 ..., The USPS Shipping Calculator allows you to choose a Flat Rate option or a shape like a postcard, letter, large envelope, package, or large package. If you choose a flat rate option like Priority Mail Medium Flat Rate® Box, you will be shown the expected delivery day and the retail and online postage prices., Rates for flats (large envelopes) and all global first-class mail increased. Global forever stamps went from $1.15 to $1.20. Rates on additional ounces for flats (large envelopes) went up by $0.05 per additional ounce for domestic flats and changed for international flats as well., 1st Class Large Envelope, 11 oz. $3.79. 1st Class Large Envelope, 12 oz. $4.03. 1st Class Large Envelope, 13 oz. $4.27. The USPS does not offer sheets of postage stamps at these rates. You'll either need to visit the USPS to print the specific postage, print them at home with a service such as Stamps.com, or use multiple postage stamps., Large Flat Rate Box, Top Loading 12 1/4" 12 1/4" 6" Always $15.80 Up to 70 lbs. Ships in packs of 10 or 25 10 pack LARGE-FRB 25 pack LARGE-FRBX APO/FPO Large Flat Rate Box, Top Loading 12 1/4" 12 1/4" 6" Always $13.80 Up to 70 lbs. Ships in packs of 10 or 25 10 pack MILI-FRB 25 pack MILI-FRBX Board Game Large Flat Rate Box, Side Loading, A standard first-class stamp covers up to 1 ounce, which typically includes about 4-5 sheets of standard printer paper. Here’s a quick guide: 4 to 5 sheets: Usually covered by 1 stamp. 6 to 8 sheets: You might need more than 1 stamp, as this can exceed 1 ounce. 9 to 12 sheets: This will likely require at least 2 stamps, as it often exceeds ..., Calculate Postcard price. View Flat Rate Envelopes. View Flat Rate Boxes. Calculate price based on Shape and Size., A flat, flexible large envelope weighing 1 ounce that’s mailed with First Class stamps might set you back $1.10. But the same package mailed using the Priority Mail Express 2-Day service could cost you $26.60. Still, the USPS provides worthwhile and exceptional services for those who need to ship items quickly., How large can an envelope be and still be eligible for First-Class Mail letter rates? USPS First Class Large Envelopes and Flats can have a height ranging from 6 ⅛” and 12”, a length between 11 ½” and 15”, and a thickness of ¼” and ¾”. , We would like to show you a description here but the site won't allow us., How Many Stamps Do I Need For A Large Envelope. How many stamps do I need to mail a large envelope? Large envelopes are 9 by 12 inch of Manila, lightweight mailers like brochures, and oversized cards. The post office will ship the large envelopes of the first class mail and we call it flats. In January of 2018, the starting price of shipping ..., Postcards & Envelopes. Mail, like postcards, letters in small envelopes (up to 3.5 oz), and large envelopes (up to 13 oz). First-Class Mail ® You're sending a letter envelope (under 3.5 oz) or large envelope (under 13 oz) that's flat and bends easily. Affordable Options. Only at the Post Office 5. Compare USPS Domestic Mail & Shipping Services, As of September 2023, sending a one-ounce letter through the Postal Service's First-Class Mail International option costs $1.50. You'll need two Forever stamps plus a stamp worth $0.18 ( [$0.66 x 2 ] + $0.18 = $1.50) to cover the postage. Fortunately, USPS has a solution- Global Forever stamps., The number of stamps you'll need depends on the size and weight of your letter. See how to send a letter. Below are the rates for standard envelopes for normal envelopes like a letter or birthday card, no bigger than 11.5” x 6+⅛” (see envelope requirements). The postal service refers to large envelopes as 'flats.' — View rates for flats., 6. For mailable items up to 70 lbs. Expected delivery in 2-5 days. Packages going to certain places (including Alaska, Hawaii, and offshore destinations), or containing hazardous materials or live animals may receive slower service. Back ^. Send mail and packages with USPS online shipping options. Choose your mail service by delivery speed ..., However, for large envelopes such as 9×12, legal, and manila envelopes, two stamps are required for the first ounce and an additional 0.20 cents for each additional ounce. International mail requires one Global Forever stamp or three Forever Stamps for a letter weighing one ounce or less. , Postcards & Envelopes. Mail, like postcards, letters in small envelopes (up to 3.5 oz), and large envelopes (up to 13 oz). First-Class Mail ® You're sending a letter envelope (under 3.5 oz) or large envelope (under 13 oz) that's flat and bends easily. Affordable Options. Only at the Post Office 5. Compare USPS Domestic Mail & Shipping Services, Calculate Postcard price. View Flat Rate Envelopes. View Flat Rate Boxes. Calculate price based on Shape and Size., Mailing a first-class letter in a large envelope weighing 1 ounce or less will cost $1.35. Each additional ounce will cost you an extra $0.24. See the table below which shows exactly how many stamps you will need to mail your letter through USPS.