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A Cups

Most of the A-cups were the same size, but Gap Body gives about an extra half-inch for the 32A and 34A. And all of the Calvin Klein styles run small by two or three inches.

Comparing the B-cups, we found the same results: Calvin Klein's were shorter than the rest in every size, and Gap Body's were roomier in sizes 32 and 34.

The same trend continued when we investigated the C-cups, except this time Gap Body's 36 style was a little bigger, too.

When we got to the D-cups, Gap Body 34 and 36Ds were longer than most of the others. Calvin Klein's versions still remained the smallest bra by far.