USPS Regional Rate Box Sizes

Regional Rate boxes come in two rates, A and B, and there are two sizes for each box.

A1 – 10 x 7 x 4 3/4 – this is around the size of a small lunchbox, smaller than the Medium Flat Rate.

A2 – 11 x 13 x 3 3/8 -this is like a thick stack of papers and almost the size of the flat Medium Flat Rate Box.

B1 – 12 x 10 1/4 x 5 – this is almost the same size as the Large Flat Rate Box.

B2 – 14 3/8 x 2 7/8 x 15 7/8.

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See Also

Regional Rate Boxes