It can be tricky getting the size right for this age as they all grow at different rates. Get in touch if you would like advice.
For an approximate size guide:
12" wheel = 2-3 yrs old
14" Wheel = 3-4 yrs old
16" Wheel = 5-6 years old
20" Wheel = 6-8 years old
Our Growth Spurt Guarantee covers bikes up to 24" wheelsize as after this they tend to get longer out of their bikes. For more information on the Growth Spurt Guarantee click here