It has been used, but there are no noticeable stains. *The size is 12M, but it has shrunk slightly due to washing and drying.* My child wore this from 3 months to 6 and a half months old. There's still room to wear it, but I'm selling it because the season has changed. Please refer to my child's height and weight (photo 13). Only sold as a set, and there are no plans to lower the price. It's equivalent to 900 yen per item!