97% Cotton, 3% ElastaneRoundneckLong-sleeveSnap button closureImportedSize & FitInfant to kids sizingFits true to size 0M Width: 8.7" Length: 16.1" Inseam: 5.1" Sleeve Length: 7.1" 3M Width: 9.4" Length: 20.1" Inseam: 6.3" Sleeve Length: 7.9" 6M Width: 10.2" Length: 22.8" Inseam: 7.5" Sleeve Length: 9.4" 1Y Width: 11.8" Length: 25.2" Inseam: 7.9" Sleeve Length: 10.2" 2Y Width: 12.6" Length: 27.6" Inseam: 8.7" Sleeve Length: 11" A BASIC BRAND Baby Rib Romper