Slipstick CB885 3-1/2 Inch Large Non Slip Rubber Floor Surface Protector Pads (Set of 4 Grippers) Round - Chocolate Brown Heavy Duty rubber pads protect floors from furniture legs while preventing unwanted sliding Large size works with almost any flat furniture like couches, sofas, armoire, pool tables, etc. Works on any hard surface flooring especially on hardwood  indoor or outdoor Measures 3-1/2" in outside diameter, 3-3/8" inside lip opening and 1/8" thick. Simply slide underneath furniture to instantly stop floor damage and hold furniture in place