This is a romper from Akachan no Shiro (Baby's Castle). The material is 100% cotton, very soft and gentle on the skin. It's made in Japan, so you can be assured of its quality. It's not a flimsy material; it has a bit of thickness to it. It has only been worn a few times and has no stains. However, due to the soft material, there are some small pills from washing. The size is 70. I am a private seller, so there may be oversights. Please understand that this is a used item before purchasing.