The original armrest is very hard and the height may not fit your table. The armrest cushion can cover it, become soft and elastic, so you don't have to worry about the worn surface of the armrest causing scratches. The armrest office chair armrest cushions are made of soft polyester and high density memory foam for the most comfortable fit on your arm and elbow. A non-slip fabric has been added to ensure that the pads are securely attached to the chair. These chair armrests feature a free removable cover with a convenient zipper that allows the cover to be machine washed at any time for easy cleaning. Size: 30 x 8 x 5 cm. We always use super long velcro to attach it to the armrest of our chair as desired. The high quality foam as well as the fabric of these office chair armrests guarantee extreme durability. You can give it to anyone and don't have to worry about the quality.