Removable cushion covers can change the look of a seating area without purchasing entirely new cushions. Since most cushions cannot be washed and dried in machines, a removable cover it can be taken off and cleaned when it gets dirty. When making covers, it isn't necessary to install ziprs or complicated attachments. Instead, use a fold system, which is much easier to sew.
Measure and cut a square of fabric, 41.2 cm (16 1/2 inches) by 41.2 cm (16 1/2 inches) inches. Cut two rectangles, each 41.2 cm (16 1/2 inches) inches by 25 cm (10 inches).
Fold the long side of one rectangle over 6 mm (1/4 inch) and iron the fold in place. Fold the edge over another 6 mm (1/4 inch) and iron into place. Sew a 6 mm (1/4 inch) hem along the folded edge. Repeat for one long end of the other rectangle.
Place the right side of the square and the right side of the rectangles together, facing the hemmed edges toward the middle of the square. Overlap the two rectangular pieces where they intersect by aligning the other three sides with the sides of the square piece.
Sew a 6 mm (1/4 inch) seam along all four sides of the fabric square. Turn the cover right side out. Sew a 6 mm (1/4 inch) hem along the outside edge of the cover to make a small exterior trim strip for the cushion. Stuff the cushion inside the cover.