Thing 1 and Thing 2 T-Shirt Cotton Adult-Small (Sizes 34-36), Adult-Medium (Sizes 38-40), Adult-Large (Sizes 42-44) Adult-XL(Sizes 46-48), Adult-XXL(Sizes 50-62) Child-X-Small (2-4), Child Small (6-8) Child-Medium (10-12), Child-Large (14-16)