Slipstick CB650 5 Inch Under Bed Storage Bed Risers / Furniture Risers, Adds 5" Height (Set of 4 Bed Lifts) Supports 2,000 lbs Perfect for raising beds 5" for additional under-bed space and extra storage Large padded top area is 3" in diameter and 5/8" deep, perfect for bed caster wheels or posts No-slip rubber base protects floors and prevents sliding for a more stable support Set of 4 will support up to 2,000 lbs (tested at 500 lbs. per riser) Smooth surface helps prevent bed bug migration 4.25 inches Top diameter top,5 inches bottom diameter,6 inches tall.