100% Cotton Imported Pull On closure Machine Wash Seams are sewn well,good workmanship,it's cute,your baby will love it. Please kindly refer to below detail size spec before buying which help you get a better fit. Shirt Collar Shirt: Age-----------Chest---------Length----Shoulder Width----Sleeve Length 2 Years-------13.0 In-------16.1 In------11.0 In-----------4.7 In 4 Years-------14.6 In-------18.5 In------11.8 In----------5.1 In 6 Years-------15.4 In-------19.7 In------12.4 In----------5.5 In 8 Years-------16.1 In-------20.9 In------13.0 In----------5.9 In 10 Years------16.9 In-------22.0 In------13.6 In----------6.3 In 12 Years------17.7 In-------23.2 In------14.2 In----------6.7 In Tips: Above size is manual measurement, there may be 1-2cm tolerance due to personal measurement in different ways.