[cypher]

That wheel is definitely too small from what I can see & I would guess your ham has some growing to do yet!
You may find it easier to find a good wheel online rather than in a shop, the wooden karlie wheel 20cm is a really good wheel for dwarfs, it does need painting with plastikote first though, I used them for quite a while before switching to the 9" silent runner, it is expensive but the best wheel I've ever tried & I've tried a lot, I'm in denial really & refuse to count how many wheels i have lol! The 20cm trixie wheel is another some people use but I found it horribly noisy, my ham loved it though!