How to choose bicycle for kids?

Here are some data for your reference.  

Age of your kids

2--5 years (85mm--110mm):  10"--12" wheelsize kids' bike

6-8 years(110--130mm)   : 14"--16" wheelsize kids' bike

9--12 years(130--150mm): 20"  wheelsize bikes

12--14 years(150mm--165mm): 24" bikes  

Hot sale bicycle for children:

Brand	Newtimes , Ocean,Ganna
Model	TY-16-014
Type	Kids' Bike
Training Wheels	Yes
Wheel Size	16"
Frame Material	Steel
Fork Material	Steel
Rim Material	Aluminum Alloy

HOW TO CHOOSE BIKES DEPENDS ON HEIGHT?

Some of us might be confused while choosing bikes.
There are many factors we need to consider such as price and hight and so on....
There is also a factor we can not ignore---our weight.
Here is a chart for your reference.

bike frame height	rider body height
15.5〞/16〞	155cm-170cm
17〞/18〞	170cm-180cm
19〞/19.5〞	180cm-190cm
21〞/21.5〞	190cm and over