I’m on a mission to make button downs work for me. (Sometimes big boobs and button downs just don’t mix.) I’ve realized that if I size up in most button downs, that’s key for me. I’m in the large of this shirt and I do think the medium would work, but sizing up makes it a touch more casual. This is a structure top, think work wear type of fabric with a hint of stretch. Overall I do think it’s a TTS fit, but for bigger boobs go up one size! I'm in the large of the poplin shorts, fit is TTS.