Place a piece of newspaper on the seat of the chair for which you intend to make a chair pad. Trace the shape of the seat onto the newspaper to create a pattern. Cut out the tracing.
Spread your fabric out on a flat surface. Lay the newspaper pattern on the fabric and trace around it, a quarter inch outside of the pattern to allow room for seams. Cut the tracing out for the top of the cushion. Repeat this step for the bottom of the cushion.
Decide how thick you want the cushions to be. Measure the circumference of the newspaper pattern. Cut a strip of fabric as long as the circumference measurement and as wide as your desired thickness.
Place the top piece of the cushion on a flat surface with the right side facing up. Lay the strip you cut in Step 3 around the cushion with the inside facing out. Pin the edges of the strip to the edges of the cushion so both fabrics are inside-out.
Pin the bottom piece of fabric around the free sides of the narrow strip with the wrong side of the fabric facing out. Sew the edges into place, leaving a 3-inch gap through which to turn the fabric right-side out.
Remove all the pins from the fabric. Turn the cushion right-side out through the 3-inch gap. Stuff the cushion with fiberfill until it is as full as you desire. Sew up the gap.