I needed a quick cover for my expensive office chair. This took less than 45 minutes to make. You can use just about any kind of fabric. An old sheet would be great. I used a medium weight, Teflon coated, cotton upholstery fabric. I will just throw it out when it gets beat up or I get too sick of the pattern (sort of ugly). Perfection is not the aim here. I am going for function not fashion.
Step 1: Find fabric, clear 2" wide tape, cording and scissors.
Recklessly cut around the chair with the fabric draped on it. Take your fabric and place it on a flat surface, right side down.