My desk chair has spent a number of years in an outdoor storage locker and had gotten rather tattered and grimy before I finally brought it home last spring. I removed the original fabric and used it as a pattern. The fabric is woven, so I cut it on the bias for a bit of stretch to help the fit. As with the original, cording is threaded through the underside to hold the fabric taut on the seat and armrests, with less than perfect results.
You’re like a magician when it comes to recovering chairs. This one looks so difficult and I never would have known it wasn’t brand new when looking at it!