Size EUR	Size mm	Foot length	Baby age *
19	108mm	10.8cm or less	0-9 months
20	115mm	10.9-11.5cm	3-12 months
21.5	125mm	11.6-12.5cm	1-2 years
22.5	135mm	12.6-13.5cm	1.5-2.5 years
24	145mm	13.6-14.5cm	2-3 years
25.5	155mm	14.6-15.5cm	2.5-3.5 years