I cannot believe I am wearing a button down top at 21 weeks pregnant. I could hardly make button downs work in my non-maternity lifestyle (blame it on the boobs) but this top fits perfectly...maybe even a tad big. The key is to go up about two blouse sizes and leave your vanity at the door. I am literally in a size I never dreamed of being in and I am actually okay with it. While I am pregnant, size doesn't really matter to me just as long as it is comfortable and more importantly-it actually fits!