ToBeInStyle Girl's Two Piece Knit Summer Dresses Pull On closure Girl's Dresses. Assorted Styles. Shrug Included. Materials: 65% Cotton 35% Polyester Machine Wash Ok. Tumble Dry Low. Do Not Bleach. Available in sizes 2, 4, 6, 8, 10, and 12 Sizes are true to size. Model is 4.5 years old, wearing size 4.