Size of Best Suitable Chair:Medium：Chair back's width：16.5-21.7inch（42-55CM）Chair back's height：22.8-27inch（58-69CM）Chair scat width：14.9-16.6inch（37-42CM）Chair scat length：16.5-21.7inch（42-55CM）Large：Chair back's width 17.7-22.9inch（45-58CM）Chair back's height 27.5-31.5inch（69-80CM）Chair seat width:17.7-23.7inch（43-60CM）Chair seat length:17.7-22.9inch（45-58CM）Why choose us?MaterialRafted with elastic polyester material, the chair cover is stretchy, breathable and suitable for ALl seasons.Easy to remove and clean.Non SlipSewn with thick elastic loops to cover the bottom edges, the upgraded zipper is equipped for keeping in place firmly, high recommended for both leather and cloth furniture.Full ProtectionThese desk chair covers are super soft and comfortable, Save you money by extending the life of your chair, Protect chair from being scratched or covered by dust.Package Including:1x Stretch office Chair covers（with armchair cover）Note:1. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid.2. Please allow 1-2cm differences due to manual measurement.