International pricing varies by destination. Single Piece First Class Letter Rates WeightĪbove prices may vary based on USPS zone. Customers can at this time still complete blank customs forms at full-service post office locations.

Per postal regulations, if mailing anything requiring a customs form, the from label need to be electronically generated at by the customer prior to arriving at the CPU. Anything larger than 3/4' in thickness is considered a package regardless of the size of the envelope. Anything larger than 1/4' and smaller than 3/4' in thickness are large envelopes regardless of what size envelope it is. Standard manila envelopes are considered large envelopes. Please note: Letter rates are only for normal business envelopes (sizes #6 or #10), which are no larger than 6-1/8' in height and 11.5' in length. New Stamp Rates Effective JanuItemĭomestic Priority Express Mail Flat Rate Envelopes

For full rate information please check the USPS website. Perhaps you are planning a large scale mailing and want to keep postage costs down by staying under the letter / parcel limits, or working out a cost analysis. Please note that this is just a brief synopsis of the changes.

Large flat envelope postage rate