Sizes 20 to 32 approx 2 to 10 years

In general 
20 = 2-3 years
22 = 3-4 years
24 = 4-5 years
26 = 6-7 years
28 = 7-8 years 
30 = 8-9 years
32 = 10 - 11 years

Please get in contact for measurements or if unsure of sizes