8" (Great for uneven floors or just raising your bed frame)Fits most bed framesSet of 4SpecificationsColor: Black & ChromeFinish: MetalMaterial: MetalWeight Capacity: 300 lbsAssembly Required: NoDistressed Finish (Y/N): NoDimension: 2. FeaturesNylon Base (To prevent floor scratching)ThreadedAdjustable Height To 5.3" x 5.