SpeedoGirl's Recycle Endura Brite Long Sleeve Printed One Piece V-Cut Swimsuit

This vendor is selling swimming costume by age so I selected my daughter's age size for purchase. But when I received actual product, it's 2 size bigger than what she usually uses. This is not an apparel. This is swimming training suit and has to fit perfectly. Please give size and size chart with other photos. Stop selling it by age group