2017-3-25 · American Apparel women's 2XL tshirt, laid over a men's L. The women's shirt is 41" in diameter, measured armpit to armpit. Fitted t-shirts are generally made in a narrower range of sizes than straight-cut shirts, and larger sizes (meaning anything over about a 42" chest/bust, the equivalent of a straight-cut M or L) are hard to find.