Standard-sized, rectangular postcard stamps start at $0.51.Square, oversized, or unusually shaped envelope stamps start at $1.06.Standard-sized, rectangular envelope stamps start at $0.66.Standard Letter & Postcard Sizes See Insurance & Extra Services Letters One price for up to 3.5 ounces with commercially priced letters and cards.Eligible for Delivery Confirmation ™ services such as Certified Mail ®.weight 4 lbs.), or Medium and Large Flat Rate Boxes (Max. Weight 70 lbs), Flat Rate Envelopes or Small Flat Rate Boxes (Max. Priority Mail International pricing varies by country price group, either in packages charged by weight (Max. For all other GXG items, prices based on dimensional weight or actual weight, whichever is greater, and country price group. Prices for items mailed in USPS-produced GXG envelopes based on weight and country price group. weight 4 lbs.) Back ^ to legal disclaimer 10ġ1. Weight 70 lbs) or Flat Rate Envelopes (Max. Priority Mail Express International pricing varies by country price group, either in packages charged by weight (Max. Visit the International Mail Manual for Priority Mail International insurance details.

Not available for Priority Mail International Flat Rate Envelopes or Small Flat Rate Boxes. Visit the International Mail Manual for Priority Mail Express International insurance details. Limitations may apply for certain destinations. Actual number of days may vary based on origin, destination, and customs delays. You must pay postage and mail your letter or package at a Post Office™ location. You can receive date-certain service with a money-back guarantee to select locations. See Publication 141 for more information on insurance. See Publication 141: Global Express Guaranteed Service Guide for more detailed information. See Publication 141 for more information.

Usps flat rate boxes shipping prices