Wodent Wheel 11" DIAMETER WODENT EXERCISE WHEEL(TOTAL HT. 12.3") W. SAFETY SHIELD & ASSEMBLED (LAVENDER & WHITE) COMES ASSEMBLED SAFETY SHIELD TO PROTECT PAWS & TAIL INCLUDED Wodent Wheel Sr  11" diameter, 3.5" wide running track, 2.6" mouse-hole shaped entry holes. Overall height 12.3". Best for lady rats, squirrels, sugar gliders, Syrian or other large hamsters and small hedgies.