Made of polyester spandex, soft and comfortable, machine washable, easy to clean Protecting your furniture chair cushion from stains, damage, hair Suit to office chair which backrest width 45-55cm (17.7-21.7 inch), backrest height 60-69cm (23.6-27.2 inch), seat width 45-55cm (17.7-21.7 inch), seat length 42-52cm (16.5-20.5 inch) Easy to install, it over the chair, the elastic edge will keep it steady and tucked in (Please refer the picture to know how to install) Specification: Material: Polyester and Spandex Size of Best Suitable Chair (a little smaller or larger is ok): Back Height: 60-69cm / 23.6-27.2 inch Back Width: 45-55cm / 17.7-21.7 inch Seat Length: 42-52cm 16.5-20.5 inch Seat Width: 45-55cm / 17.7-21.7 inch Package Includes: 1 Piece Office Chair Cover