One size fits all for the crawling stage. We know each Little One begins crawling at their own pace so our ‘grow with me’ leggings are designed with cuffs, and extra stretch to help fit your child comfortably. Made from 95% rayon from bamboo, 5% spandex. Machine washable. Ribbed cuffs can be rolled up at the hem keep pant legs in place. Material: 95% Bamboo-rayon, 5% spandex.