Xhiliration multicolored sleeveless short top-size L

Xhiliration black base complemented with orange, blue, red & white sleeveless short blouse. Vneck. Buttons down the front. Size M. Armpit to armpit is 20 inches, length is 21 inches. Material is 100% polyester. In new condition. Says it’s a size L, however, measurements say it is a size M.