Define Essentials 4-pack 5 to 6 inch Heavy Duty Bed Riser (White) These bed risers add an additional 5.25-inches of height to your bed. They are made of durable, high-impact resistant composite plastic polymer, and can be conveniently used on virtually any type of bed. Each riser features a 1-inch lip to keep bed posts or casters securely in place. Includes: Four (4) bed risers Material: Plastic Color: White Dimensions: 6.3 inches long x 6.3 inches wide x 6 inches high