I'm a woman and I bought these to wear as everyday white tees. All the reviews I saw were written by men, so I thought I'd offer my two cents.

Despite what some reviewers have said, the shirts I received are definitely see-through  I tried one on without a bra and everything was very visible, even in low light. That said, they're NOT that heavy, stiff fabric so many men's shirts are made of, and they feel well-made. I machine-wash and hang-dry them, and they're holding up very well.

I normally wear a 34C, a women's small or medium top and size 4 dress. I ordered size small and they fit ... not exactly tight, but not really drapey. If you're looking for a looser, more tuckable fit, you should probably match your chest measurement to the size chart and then go up one size.