Wodent Wheel SENIOR 11" DIAMETER w. SAFETY SHIELD & ASSEMBLED (LT. BLUE & WHITE PANELS) 12.3" TOTAL HEIGHT W. STAND 11" wodent wheel has safety shield included to protect paws & tails ASPCA approved 5 entry holes for pet's easy access easy disassembly for cleaning 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.