I have really broad shoulders for a female. Between that and my chest, I've always had to size up wearing women's clothes and it would upset me because the fabric would just hang and not define my waist at all. (I'm an "inverted triangle" where my shoulders and chest are quite a few inches wider that my waist and a couple inches wider than my hips.) I've been wearing a size 1X top in women's and a size 8/10 in women's jeans. Decided to slip on my husband's t-shirt yesterday (because he's deployed) and his medium fits me perfectly. Anyway, I guess its men's t-shirts and sleeveless womenswear from now on for me, lol.