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Weight and Shape/Size. What unit of measurement are you using? Standard Metric. What is the weight of your mail piece? Pounds. Ounces. Kilograms. Please select from the following options.
Postage for letters mostly depends on weight and size/shape. You can weigh your letter with a kitchen scale, postal scale, at a self-service kiosk, or at the Post Office ™ counter. TIP: As a rule of thumb, you can send 1 oz (4 sheets of printer paper and a business-sized envelope) for 1 First-Class Mail ® Forever ® stamp (currently $0.73).
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. All postcards and envelopes (or flats) must be rectangular, otherwise an additional charge may apply.
Retail Postage Price Calculator Video Library. What's the destination country? What ZIP Code are you mailing from? What ZIP Code are you mailing to? What's the value of the item being mailed? What's the Date you plan to mail the item? What's the Time you plan to mail the item?
Find answers to common questions about postage stamps, including how to buy, use, and collect them.
You can check out the starting prices for many of our domestic and international mailing and shipping options below or visit the Postal Explorer ® website to review the full USPS ® Price List. Not sure which mailing service you need?
Calculate the postage price for mailing letters, postcards, flat rate envelopes, boxes and more with the Retail Postage Price Calculator.
Determine how much postage or how many stamps you need for your letter or package based on size, weight, and destination.
Postage for international letters depends on weight, size/shape, and the price group of the country that you’re sending to. (See the Country Price Groups listing.) You can weigh your letter with a kitchen scale, postal scale, at a self-service kiosk, or at the Post Office ™ counter.
Large Envelopes. minimum. maximum. 11-1/2 inch min. 15 inches. 6-1/8 inch min. 12 inches. Packages. Maximum length plus girth 108 inches (130 inches for USPS Ground Advantage)