I purchased some inexpensive muslin to use for making a pattern for the slip cover. What does this entail?
Well, it means I cut and pin the pieces together directly on the couch. This allows me to trim away excess and keep in mind how the piece will have to "slip" over the curves of the couch. So far I've done one section of the back of the couch (since it's a lazy boy couch each back section comes off individually).