Wodent Wheel 11" Diameter Dark Blue with Black(12.3" Total Height) Safety Shield Included ASPCA recommended Exercise Wheel for sugar gliders, Hedgehogs, & other small pets 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.