Wodent Wheel 11" WODENT EXERCISE WHEEL (LIGHT BLUE WITH BLUE PANELS) Wodent Wheel Sr. 11" diameter, 3.5" wide, 2.6" mouse-hole shaped entry holes. Overall height 12.3". Best for Sugar Gliders, lady rats, squirrels, Syrian or other large hamsters and small hedgies PLUS - NEWEST SAFETY FEATURE-SAFETY SHIELD INCLUDED- TO KEEP YOUR PET SAFE WHEN EXERCISING