I purchased this blouse in nearly every color when I was first jumping back into Lolita fashion and I have since then purged pastels from my wardrobe. This is a size M blouse and is pretty generous in sizing. I will warn you that the lace around the arms can be a bit itchy and the neck can feel a bit constricting. Nonetheless it is a very cute and versatile blouse! I have an 88cm bust and 72cm waist and can wear between a S and 2L in this blouse. It all depends on how loose you want it and how you plan to style it! A size M is my preferred size. I hope this helps!