Shape-Shifters Beware!

The USPS also is testing other letter-size designs, such as large postcards, folded self-mailers and thinner booklets. So catalogers that use other nonenvelope designs could be faced with design changes on those pieces as well.

This past March, the USPS published some preliminary thoughts on design characteristics that it felt were problematic. It then began conducting a series of complex engineering tests to look at a long list of design characteristics, including size, thickness, cover stock, tab style, tab strength, tab location and binding techniques.