Just looking into the confusing world of kids bikes. DS has short legs! Inside leg wise he'd need a 14" bike, but height wise he'd need 16" bike. I have a 16" bike in the shed. But I'm worried if I put him straight from a 12" to a 16" he might fall off and put himself off. He's only just learnt to ride, having come straight off a balance bike. So wwyd, would you size up or at this point in his riding would you say it's better to go with the correct fit for his short legs so that he can get his feet down easily? Even if he only has that bike for a few months?!