Two-piece set of GU sheer tops (short-sleeved and long-sleeved) Long-sleeved: M size Short-sleeved: L size Both were tried on and purchased in the spring, and worn 1-2 times each. The size feels like M and L, but I chose sizes that made me look slimmer when I wore them, so I think you can wear them as if they were free size. I have a natural bone structure. The material is surprisingly hot in midsummer, and also surprisingly good for avoiding air conditioning, so I think it's easy to use from the beginning of autumn. [I'm also selling a dress (Angem) that completes your outfit when worn as a set! :)]