The 55" X 63" Large Size Computer Chair Mat, Desk Chair Mat, And Large Anti-Slip Office Chair Mat for Hardwood Floor ?Large Size Design?The size is 55"x63". It can cover your work area to the greatest extent and better protect your floor. No longer have to worry about the chair easily rolling to the floor and causing damage. ?Anti slip stability?The back of chair mat is mde of upgraded adsorption material, which is super anti slip. So when using, be sure to tear off the film on the back and stick it firmly on the hard floor to prevent it from curling. This adhesive will not leave any traces on the floor. Note: This seat cushion can only be used on the hard floor, not on the carpet. ?Effectively HARD FLOOR Protector?The floor mat prevents wear and tear on your wheels or floor, such as hardwood, tile, laminate, linoleum floors (NOT suitable for any carpets or half rug), and prolong their service life. It also help reducing the noise of rolling chair, even playing games or working at night will not affect the others. ?Easy to Use Clean?Please ensure the chair mat and floor are completely dry and clean, tear off the film on the back, and put it on the floor, press lightly so it can gently stick to the floor. If it is used again, the adsorption effect will not be weakened. If the surface of the chair mat is dirty, please try to use a vacuum cleaner instead of a washing machine. ?Tips?When it is used for the first time, ironing with an iron will make the mat remove creases faster. Or you just need to follow the use steps (in the product description below) to stick it on the hard floor, it will recover flat completely.