Kids bike sizing can be found easily using the following guide:
12" Wheel - 3 to 5 year old's (78-94cm)
16" Wheel - 5 to 7 year old's (84 - 112cm)
20" Wheel - 7 to 9 year old's (108 - 129cm)
24" Wheel - 9 to 12 year old's (125 - 148cm)
26” Wheel - 13 years+ (145cm - 160cm)
For sizing guides for all adult bikes, there are different recommendations for each make and model, checking the sizing guide on each bike you are viewing is important when making your choice. You can find the sizing guide charts on all of our bikes, simply scroll down until you can see all of the information tabs, and locate the one named "Sizing Guide".