Small (2-4/6), Medium (6-8/10), Large (10-12/14) I can't decide what I love most about this romper because every part of it is PERFECTION!! The gorgeous navy and socially acceptable length is tops on my list tied with the beautiful scalloped neck and hemline, 3/4 bell sleeves and the elasticized waistline! Rayon/Poly blend. Umgee brand. Brooke wears a small.