When your 2-3.5-year-old rider is ready to take flight on two wheels, the Cleary Gecko is the bike to do it. The Gecko provides a seamless transition from a push-bike, making it a safe and fun foray into the world of two-wheeled adventure. This 12-inch lightweight kids bike will be your little one's ticket to freedom. The single-speed drivetrain makes learning to pedal simple and intuitive. There's a handle into the bottom of the saddle so you can easily help your child balance before they ride off on their own! Don't worry, they'll be back. Cleary recommends measuring your child's inseam and referencing their size chart to determine the best fit. - The Gecko best fits riders with an inseam of 14" to 18". First-time riders feel safest with their bottom on the saddle and their feet flat on the ground. - A child with a 15" inseam will fit the Gecko with the integrated seat/seat post dropped as low as possible. Once kids get comfortable on two wheels, they'll want to sit on the saddle with only the balls of their feet on the ground. Thus, a confident rider with a 15" inseam and a first-time rider with a 17" inseam each will feel comfortable set-up with the same position on their bikes.