Nonstandard Size Mail

First-Class Mail or single-piece Standard Mail (A) weighing 1 ounce or less and exceeding any of these size limits:

More than 11-1/2 inches long.

More than 6-1/8 inches high.

More than ¼ inch thick.

Having a length that is less than 1.3 or more than 2.5 times the height.

This type of mail will incur a surcharge.