Maybe this will help:
Need more information please
Have you checked into slip covers on amazon.com (it is very hard to beat their prices and selection).
It depends upon what type of chair....Do you want a slip cover that can be removed and washed or do you want to do more of a reupholstering job?
Here is a Hometalk article on how to make slip covers: https://www.hometalk.com/15838973/making-your-own-slip-covers
Hello there! Chair covers really change up your furniture so much and make them look new. My grandmother used to make her chair covers out of strong fabric. She would just make a pattern of the cushion, and also make a pattern of the chair itself and off she went. There is a video that looks like some of the chairs my grandmother redid. She also did her couch. Check out these sites for help. There is a ton of information out there. And my very best wishes to you for a Merry Christmas!!!