With a measuring tape, measure the dimensions of your settee: the width, length and height. Take these measurements with you to the upholstery shop when you purchase your fabric. Also bring a pillow or blanket from your room to help you match color of fabric to the decor in your room.
Take the old upholstery off the settee. Using needle-nose pliers, remove any tacks and staples that hold the fabric to the frame.
Use the old upholstery fabric as a pattern to cut your new upholstery fabric. Place the old fabric on top of of your new fabric and pin it securely. Cut the new fabric with the scissors, using the old fabric as a guide. Leave an extra 3 inches to the perimeter of the new fabric when cutting.
Lay the new fabric over the front and back of the settee, tucking it into the seat and using the staple gun to staple the back end to the underside of the frame. Keep the fabric taut while stapling so it lays smoothly against the back of the settee. Pull the sides of the fabric around either side of the settee and staple them to the frame.
Place the fabric on the seat of the settee and staple it underneath the frame on the front and sides. Hold the fabric taut while stapling to get a smooth fit.