Heeyoo Dog Stairs for Small Dogs, 4-Step Dog Steps for High Bed and Couch, High-Density Foam Pet Steps with Supporting Board, Non-Slip Removable Washable Cover, Grey, 18" HighPet Friendly Design: Heeyoo foam dog stairs help pets get on high bed or couch comfortably. It's suitable for small and medium dogs. The dog ramps can be easily folded into a soft dog bed when your pets need to rest 2 Sizes to Choose From: The 4 step measures 18'' for reaching beds or sofas (up to 23inch high). The 5 step which is 23'' suits for higher beds (up to 27inch high) Safe and Steady: Made from a 30D high density foam and firm supporting