Doggy Steps™ help small or aging pets reach their favorite spots. Your buddy doesn't have to give up his cozy chair just because arthritis or hip dysplasia has slowed him down. Great for toy breeds, and cats just can't resist it. Lightweight staircase goes anywhere. Sturdy plastic frame has removable, washable poly/fleece cover. Three step size is 18" D x 14" W x 12" H. Four step size is 24" D x 16" H x 14" W. Both support up to 70 lbs.