Size: Four The Easy Step Bed Stair was designed specifically for smaller pets. Its deep steps give your pet the ability to get their entire body on each platform and a shorter step height makes climbing the stairs easier for pint-sized pets. The new space-saving design allows the stairs to wrap snuggly around furniture taking up less room in your home. These stairs feature a hinged back panel that lifts up for easy access to storage space underneath the stairs. Carpet treads remove easily and are machine washable. Setup is literally a snap as the stair easily snaps together no tools required.