USPS Priority Flat Rate SMALL box is not showing up as an option to choose from to ship

Question

USPS Priority Flat Rate SMALL box is not showing up as an option to choose from. The only options that are popping up are "Medium" and "Large".

lisa5768 · Answer

@quality-focused

eBay made a change related to setting up listings with certain types of packaging. If you want to use a specific Priority Mail flat rate package on your listing you must enter specific dimensions which correspond to the dimensions of the package.

When package dimensions entered exceed the programmed dimensions the form will not show you those shipping options when setting up your listing.

To access these services, enter the following package dimensions:

USPS Flat Rate Envelopes: 12 x 9 x 1
USPS Small Flat Rate Box: 8 x 5 x 1
USPS Med Flat Rate Box: 14 x 12 x 3
USPS Large Flat Rate Box: 12 x 12 x 6
eBay Standard Envelope: 11 x 6 x 0.25

You do not need to enter the package dimensions on the shipping label page when you purchase as the default is 1x1x1.