​This height handlebar is now fitted to our 16" model as standard. They are around 5.5cm higher then the old low handlebars.
 
These are for 19mm/22mm inner diameter grips. 
 
Please note if you plan to fit these to your 12" or 16" bike that currently has low handlebars you will also need a new throttle with a longer wire and longer brake cable.  We also sell a complete kit.