Lovful One Piece Cotton Baby Boys Girls Striped Romper Pajamas+ Hat Set 0-3 Months:length 20",bust 20", sleeve length 8",hat circumference 13"- 15" 3-6 Months:length 22",bust 21", sleeve length 9",hat circumference 13.5"- 16" 6-12 Months:length 24",bust 23", sleeve length 10",hat circumference 14"- 16.5" Comfortable to Wear and convenient for diaper changing Best gift for your Baby