We use centimeters in our sizing. It gives a more accurate fit.
Our sizes: 45 cm, 50 cm, 60 cm, 70 cm and 80 cm.
To get the right size for your baby , all you need is the baby’s length.
45 centimeters - 0 to 2 weeks Fits 17 to 20 inches 50 centimeters - 0 to 2 months Fits 19 to 22 inches. 60 centimeters - 2 to 5 months Fits 22 to 25 inches. 70 centimeters - 6 to 12 months Fits 26 to 30 inches. 80 centimeters - 12 to 18 months Fits 30 to 34 inches.