Pointss Girls&rsquo; Swimwear Summer Swimsuit One Piece Beach Bath Suit Please check the follow size. The Medium is available for the kids whose height are 45~49 inches, 5~7 years old. The Large is available for the kids whose height are 49~53 inches, 7~9 years old. The X-Large is available for the kids whose height are 53~57 inches, 9~11 years old. The XX-Large is available for the kids whose height are 57~61 inches, 11~13 years old.