High Quality: The office chair carpet is made of polyester fiber with no special odor, absorbent and dirt resistant for a healthy indoor environment. No need to worry about the wear and tear of the chair during use. Chair Cushion Size: There are 4 sizes of chair cushion. Size 1 is: 80 cm/31.49 inches in diameter; Size 2 is: 100 cm/39.37 inches in diameter; Size 3 is: 120 cm/47.24 inches in diameter; Size 4 is: 140 cm/55.1 inches in diameter. The thickness of the chair cushion is about 7 mm. The perfect size fits right between the legs of your desk and covers a large area for your chair. Safe and Durable: The back of the chair pad provides complete stability, holding the desk floor mat firmly in place while in use. It protects your hard floor from stains or scratches and damage caused by chair wheels, while also protecting you from falls or chair slips. Easy to Clean and Store: The chair cushion can be vacuumed to remove surface dust and fine debris, and can also be washed by hand or in the washing machine. The cushion does not wrinkle, curl or fade. Easy to fold and store when not in use. Wide Range of Uses: Suitable for under chairs, computer tables, plants, decorations, crafts, tables and desks, etc. It is hard enough to support heavy equipment. Designed for hard floor surfaces, suitable for hardwood, tile, linen floors .