Ultra strong carbon steel bed risers are designed to fit square bed frames to provide extra height! Bed Risers stand 9.85" tall, adding 8" of height to give your Twin or Twin XL bed an extra boost. Reclaim your dorm! Dorm life doesn't need to feel cramped, gain maximum organizing space and storage with our Carbon Steel Bed Risers. Overall Dimensions 3.15'' x 3.15'' x 9.85''H Note Your bed post must be a college dorm bed post that measures less than 3.15" in diameter. All Standard College Dorm Bed Posts range from 2-3" in Diameter. Does NOT include an actual bed frame, includes Bed Risers ONLY. Product has been weight tested for use with Twin and Twin XL beds.