I used these when my child was about 1.5 years old in the summer. The goldfish pattern is size 90, and the ribbon pattern is size 80, but they are almost the same size. There are no noticeable stains, but there is some fading and pilling on the belly band area. The goldfish pattern is from Nishimatsuya, and the ribbon pattern is from Akachan Honpo. They are made of a light, 100% cotton material. Thank you for looking. -