I've reupholstered seats before and it's best to use the old pieces as templates as ToddA1 mentioned. You can measure as carefully as you can but you always end up short. Especially since you're needing to follow the design of the fabric.
A forum community dedicated to all Volkswagen owners and enthusiasts. Come join the discussion about performance, builds, modifications, classifieds, troubleshooting, maintenance, new releases, and more!