I haven't had any problems with my Silent Spinner. I know because I have one for my Syrian hamster, who isn't small and will soon be getting a 11" wheel. The only sound I hear at night is her nails clicking against the plastic and that's if I'm really listening for the noise. A 12" would be OK but some people prefer a Wodent Wheel for that size since it has a lid with holes in it so your hamster can get in but not fly out. My hamster has never flown out of her Silent Spinner and she runs really fast.
