0-6 Months 11cm/4.33" 5.6cm/2.20"
7-12 Months 12cm/4.72" 5.8cm/2.28"
13-18Months 13cm/5.12" 6.0cm/2.36"
Tips:1.Please choose the size,the age is just for reference.
2.There is 3-5% difference according to manual measurement.
Any problem, just feel free to contact us, we will try our best to solve your problems at once.