Chair Socks: Put an end to classroom clatter with these chair sox from The Pencil Grip. Their sturdy construction eliminates distracting noises of shuffling chairs and desks in a classroom setting. Chair Foot Covers: The chair socks come pre-cut and ready to put on. Assembly is easy, just slip it over the foot of the chair, no tools required. Tennis Ball Covers: These chair sox are chapped like the classic yellow tennis balls, creating a fun look to your chairs. The chair foot covers can be used for walkers as well. Classic Chair Sock: The product’s manufacturing process may emit an odor when first opened, please do not be alarmed. The odor is not hazardous or otherwise harmful. Simply allow your product to air out for 24 hours before use. Size Details: The tennis ball chair sox fit all standard classroom style chairs and desk legs. Each pack contains 4 tennis ball covers.