Chair Protector Caps:25mm (1 inch) inner diameter opening to prevent legs from slipping; Outer Diameter: 1.1 inch (28mm). Premium Rubber No Smell: The chair foot caps are made of premium durable rubber, which does not emit chemical smell strong. They not only provide durable protection for chair legs, but also protect carpet from snags and hard floor surfaces, bumps, marks and scratches. Noise Reducing :Thanks to the special treatment, the chair leg pads easily dampen the loud noises you make when sliding the table or chair. It's always annoying to hear the noise when you focus on something like reading. Anti-slip Benefits:Rubber seat tips can hold your furniture in place when use. And you won't worry about falling out of a chair, especially for children. Indoor and Outdoor Usage: You can use them for indoor or outdoor chairs, don't like indoor only chair socks. These rubber chair leg caps apply to the legs of many pieces of furniture such as chairs, stools, tables, sofas, beds, cabinets, etc. Ideal for creating a safe and protective look at the end of straight or angled legs. Meet your different needs in all aspects.