Priority Mail is a 1, 2, or 3-day service and Priority Mail Express is a guaranteed overnight delivery service. Flat rate boxes are available for two USPS services: Priority Mail and Priority Mail Express. What Are USPS ® Flat Rate Boxes?įlat Rate Boxes charge one flat rate no matter what you are shipping.'If it fits, it ships!' Using flat rate shipping options can save your business as much as 50% on shipping costs compared to the other major carriers' rates. I can say with confidence that flat rate shipping tops our list! USPS flat rate boxes and envelopes are boxes with flat shipping postage rates-no matter how heavy the package! If you are shipping small, heavy items, flat rate is the best deal out there. You are allowed to use these ones for Poshmark packages but pay close attention to the prices and rules of flat rate mailers when shipping on other platforms.As part of our effort to make sure our customers get the best deals on shipping, we are talking about some of our favorite cost-saving services. These are useful when shipping priority mail on platforms such as Ebay and Mercari. This essentially means that they can be shipped for one price no matter the weight of the package. Heads up! Some of these boxes and mailers are labeled ‘flat rate’. Through trial and error i’ve come up with this ultimate guide to USPS Priority mailers and boxes and which ones work best for me and for shipping on Poshmark. It’s taken me some time to figure out what boxes and mailers I love the most. Poshmark makes it easy and just uses priority for all packages.)

(First class mail generally applies to all items that weigh under 1 pound or 16 ounces. I mostly use these supplies for Poshmark and tend to only use designer polymailers when I am shipping through first class mail on another platform.

This means that no matter the weight (as long as it’s under 5 lbs), you can ship your packages using the FREE Priority Mail supplies from USPS. One of my favorite things about selling on Poshmark is that all of the packages are shipped through United States Postal Service Priority Mail.

The Best Free USPS Priority Mailers and Boxes for Poshmark The Ultimate Guide for Shipping on Poshmark

Usps order flat rate envelopes