I'm a ronaldinho ac milan jersey small guy (~5'1", 100 lbs) and I needed v-neck undershirts for under my button downs when the top button is left open. I can't wear men's clothes so I usually buy boy's, but v-neck undershirts for boys are apparently not that common. I mostly just found t-shirts that they were calling undershirts. I wanted something that was tighter/form-fitting and not loose so it doesn't bulk under my shirt, which is when I thought about women's clothes. I came across these shirts and got the US size small in black, gray, and white. They're perfect! They feel smooth and cool, they stay pretty close to my body, and they have a v-neck. The sleeves are also longer than other women's shirts which is great for my situation. The gray actually is pretty invisible under button-downs for a pale, white guy like myself and the white works well too. The other day I wore the black under a black and gold shirt and it was great! The little logo on the front is kind of annoying but I don't think you can see it through the shirts and eventually it'll probably come off. Overall, amazing for something it wasn't even designed for! I'd recommend these for any short people who need undershirts.