It’s difficult to assign a gender category to this vintage shirt. The buttons are on the right, which typically indicates a men’s style, and it’s labeled a size medium. However, it doesn’t fit like a standard men’s medium or women’s medium. The arm length is shorter at 21 inches, and the length from shoulder to hem is approximately 24 inches. This would fit a woman’s small or extra small 20” Pit to Pit 24” Length 21” Arm Length