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A large sofa: 10 to 14 yards of 60-inch-wide fabric or 16 to 20 yards of 45-inch-wide fabric. A small sofa: 6 to 8 yards of 60-inch-wide fabric or 10 to 12 yards of 45-inch-wide fabric. A small table: 5 to 6 yards of 60-inch-wide fabric or 6 to 8 yards of 45-inch-wide fabric. A standard-size armchair: 4 to 6 yards of 60-inch-wide fabric or 8 to 10 yards of 45-inch-wide fabric.
To figure out how much fabric you'll need, draw a sketch. Basically, you'll have a rectangle of fleece, surrounded by a larger rectangle; the part in-between the two rectangles is the length of your ties. The fabric usually comes 58-60 inches wide, so use that as the width of the larger rectangle.