Where Can I Buy Flat Rate Shipping Boxes (2024)

While they operate differently than the USPS, they also offer fixed-rate shipping options with dedicated packaging.

: You can find boxes for UPS Simple Rate at The UPS Store . Unlike USPS, UPS often allows you to use your own packaging for their flat-rate service as long as it meets their size requirements. 3. Third-Party Retailers where can i buy flat rate shipping boxes

: You can find flat rate boxes for sale on Amazon and eBay, though these are often resold or specialized versions. While they operate differently than the USPS, they

: You can also order these supplies by calling the USPS Package Supply Center at 1-800-610-8734 . 2. FedEx and UPS where can i buy flat rate shipping boxes