S 15" from armpit to armpit 24 7/8" from top middle of collar to the bottom 11" Armhole. M 16" from armpit to armpit 25 1/2" from top middle of collar to the bottom 11 1/2" Armhole. L 17" from armpit to armpit 26 1/8" from top middle of collar to the bottom 12 Armhole.
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