To make a bench cushion, measure the seat, cut the foam and fabric, and sew the pieces together. Choose a foam thick enough to provide a comfortable, long-lasting seat.
- Measure and cut the foam
Measure the bench's seating surface. Draw these dimensions onto a piece of thick foam, and cut along the lines with an electric knife.
- Calculate fabric yardage
To calculate the necessary fabric yardage, add 1 inch to the length and width of the foam. Use these dimensions to cut two pieces of fabric for the top and bottom of the cushion. Measure the depth and circumference of the foam, and add 1 inch to each of these numbers. Use these dimensions to cut a strip of fabric long enough to go around the sides of the cushion. Piece multiple strips together if necessary.
- Sew the seams
With right sides facing, pin the side strip to the top piece, and sew a 1/2-inch seam all the way around. Pin the side strip to the bottom piece, right sides facing, and sew around both long sides and one end. Leave one end open to insert the foam.
- Finish the cushion
Insert the foam through the opening. Close the opening with hand-stitching.