there’s no tags inside but waist is 15” flat so would be oversized fit for XS or S & regular fit for a Medium 29” long & 2” inseam of shorts. sold out online. this sleep romper guarantees comfort. The soft material hugs all the right curves of your body and is gentle on the skin. Pop on your favorite bathrobe and slippers for the full cozy look. Style: Romper Fabric: Fleece 70% polyester, 30% polyester. machine wash. model wears US size 6.