Size Guide: Small for chair back's heigth 17.7-22inch,chair seat length 14.9-16.9inch, chair seat width 14.9-16.9inch;Medium for chair back's heigth 22.8-27inch, chair seat length 16.5-21.7inch, chair seat width 14.9-16.6inch; Large for chair back's heigth 27.5-31.5inch,chair seat length 17.7-22.9inch, chair seat width 17.7-23.7inch.Please measure your chair size before ordering.Packaging: 1PC office chair cover only+arm coverZipper Design: Office Chair Cover Zippers are designed on both chair back sides for facilitate fixation and using.Sewn with elastic loops to cover the bottom edges and easy to install.Durable fabric with elastic edges secures the cover in seconds.Chair Cover Great for office chair,computer chair and armrest chair,etc.Office Chair Protector: The gaming chair cover can prevent your chair from kids playing or pet's cratch and bite,Protect your chair from daily wears and tears.Chair covers protect your office chair from stains, dirt and hair, keeping your furniture looking new.It is a great option for the family with pets and kids.Waterproof PU Material: This office chair cover made of PU leather.The PU leather stretch chair cover has good quality,wrinkle resistant,soft and comfortable cover.The back has a short fleece that won't slip off easily.Easy to Clean: Office Chair Cover Easy care and maintenance.We recommend cleaning with a damp cloth.Only need to wipe with a soft wet cloth when there are stains on the surface of the chair.Do not use bleach.Dot not iron.