Size 6M/66, suits for 3-6 months, baby's height of 59-66cm; Size 9M/73, suits for 6-9 months, baby's height of 66-73cm; Size 12M/80, suits for 9-12months, baby's height of 73-80cm; Size 24M/90, suits for 12- 24 months, baby's height of 80-90cm. Crafted with 98% cotton, this romper ensures ultimate softness and breathability. Gentle on newborns' delicate skin, making it ideal for the warm summer months. Embrace the adorable Korean-style design featuring delicate bow-knots and a beautiful mesh overlay. The romper's bodysuit design allows for easy diaper changes, combining fashion with functionality.