Rose Healthcare (Set/4) 4" Tall Bed Or Chair Risers - Gives Additional Height To Furniture Use 4 risers to give your bed or chair a boost, or use 2 risers to lift the head of the bed and help ease reflux symptoms. Extra-wide base and deep cavities provide strong support, and won't harm floors or carpet. Sturdy, high-density risers hold up to 300 lbs. each (1200 lbs. total for set of 4). Total rise is approx 3 1/4 inches due to top indentation (to provide secure footing and avoid furniture slippage). Note: Queen/King-sized beds with center leg frames will require additional risers for safe support.