Best Fit Chair Size (M): Back Height: 23.5-27 inches (60-69 cm); Seat Length: 16.5-20 inches (42-52 cm); Seat Width: 17.5-21.5 inches (45-55 cm).< /p> Water-resistant jacquard fabric protects your office/computer chair from unexpected stains. Available in various colors and patterns to suit any interior. Comes in M/L size, fits most types of office chairs. Perfect choice for home study, office. Elastic band design provides a snug fit and non-slip grip. Elastic fabric for easy application. Totally machine washable. Do not use chlorine bleach, wash dark colors separately, iron at low temperature with steam.