This is a 3-piece set consisting of a jacket, a short-sleeved dress, and a short-sleeved jacket. In the summer, you can wear the dress alone, or you can wear it with the short-sleeved jacket; either way is fine. The ribbon on the long-sleeved jacket is removable and can be fastened with a hook even without the ribbon. When I wore this, I was 153 cm tall and weighed 47 kg, with an average build. I usually wear a size M. This mourning dress fit perfectly, but I'm selling it because I've had a baby and want something more relaxed. I bought this at Shimamura. If the size is suitable, I plan to ship it in a mailing bag, so please understand.