This wheel makes no noise at all. my daughter left all night and it does not bother her. Regarding the size, we have a roborovski hamster wheel and this 15cm is exactly what is needed. We had purchased the m th ^^ larger, but the hamster could not turn it !!! Also be careful because the wheel 20cm is very high and if you have a cage 3 floors, it is a problem to place it in the right place, considering its size.