High Quality: The office chair mat is made of polyester fiber without any special odor, is absorbent and dirt-resistant for a healthy indoor environment. You don't need to worry about chair wear during use. Chair Mat Size: There are 4 sizes of chair mats. Size 1 is: 80 cm in diameter; Size 2 is: 100 cm in diameter; Size 3 is: 120 cm in diameter; Size 4 is: 140 cm in diameter. The thickness of the chair mat is about 7 mm. The perfect size fits exactly between the desk legs and covers a large area for your chair. Safe and Durable: The back of the chair mat provides complete stability and keeps the desk mat firmly in place during use. It protects your hard floor from stains or scratches and damage caused by chair wheels, while also protecting you from falls or chair slippage. Easy to Clean and Store: The chair mat can be vacuumed to remove surface dust and fine particles, and can also be washed by hand or in the washing machine. The mat does not wrinkle, curl, or fade. Easy to fold and store when not in use. Wide Range of Use: Suitable for under chairs, computer desks, plants, decorations, crafts, tables, and desks, etc. It is hard enough to support heavy equipment. Designed for hard floor surfaces, suitable for hardwood floors, tiles, linoleum floors.