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Upholstering Instructions at Better Homes and Gardens. In a nutshell: Strip the chair of its original fabric and use the pieces as pattern. Then pin the pieces wrong sides out onto the chair. Remove pinned cover and sew it together, with welting reinforcing the seams. Put sewn cover back on the chair. It should fit like a glove!
DIY:: GREAT ! Painting Upholstered Furniture Tutorial By Jacque Skaggs Skaggs Skaggs @ theDIYvillage
Very helpful tutorial on how to re-upholster furniture by an interior designer. @Jessie Weis-Brazle -havent checked the link yet but i know you were wanting to recover the couch