Ultra strong carbon steel bed risers are designed to fit college dorm 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 and more underbed storage space Reclaim your dorm! Dorm life doesn't need to feel cramped, gain maximum organizing space and storage with DormCo's Carbon Steel Bed Risers Overall Bed Riser Dimensions: 3.15'' x 3.15'' x 9.85''H - Adds 8" of height to your bed! Note: Your Twin / Twin XL 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. Add our Carbon Steel Bed Risers to your list of organizing essentials to provide extra storage space. These sturdy metal bed risers add a total of 8" of height to your Twin or Twin XL bed to allow more underbed storage. This allows you more space to keep your college dorm room, small apartment, or bedroom at home organized.