Nike Kids Swim Size ChartThe NikeĀ® Kids Logo Tape Cross-Back One-Piece features standard bottom coverage for a comfortable, worry-free fit that's made to move in the water.Ergonomic enhanced fit designed for the young athlete.Crossback design for freedom of movement.Woven elastic provides comfort and optimal range of motion.80% polyamide, 20% elastane;Lining: 63% polyamide, 19% polyester, 18% elastane.Hand wash, line dry.Imported.Measurements: One Piece Length: 24 inProduct measurements were taken using size SM (7-8 Big Kids). Please note that measurements may vary by size.If you're not fully satisfied with your purchase, you are welcome to return any unworn and unwashed items with tags intact and original packaging included.