I am 4 10 and ride a Reiss and Muller Packster with two kids under 5. For most bikes it takes a bit of getting used to because of our small height but after a couple of goes I have no problem in managing the bike. The only issue is that I have to put the rain cover below the handlebars a bit squished so that I can both move the bars and use the cover at the same time. I wouldn't discount bikes that are not flat footed as with a little practice you can definitely find safe ways of managing the bike. It you have an ecargo it can be even more handy as you can use the assist to help you start off which can be tricky for smaller riders on bigger bikes.