Create your template on another sheet of cardstock. Begin with a vertical rectangle that has a rounded top and bottom. Make the rectangle about 8 inches (20.32 centimeters) high, and 2½ inches (cc.35 centimeters) wide. Cut the template out when you are done.
Use the template to trace the liner pieces. You will need 3 to 4 pieces of soft toweling. Use the template to trace to more pieces out of flannel; this time, add a ¼-inch (0.64-centimeter) seam allowance. The toweling will make the liner. The flannel will make the liner cover.
Match the flannel to the base pad.
Stack and sew the toweling pieces together. Use a ⅛ to ¼-inch (0.32 to 0.64-centimeter) seam allowance. Go around the edge of the piece using a zigzag stitch. Set the stack aside when you are done.
Do not include the two flannel pieces in this stack.
The color of the thread does not matter. You will be putting this inside the liner cover.
Sew the flannel pieces together to make the liner cover. Pin the flannel pieces together with the right sides facing in. Sew around them using a ¼-inch (0.64-centimeter) seam allowance. Do not leave a gap for turning. You will be cutting a slit into the piece instead.
Cut a vertical slit into the liner cover, then turn it right-side-out. Use the same technique as you did for the pad base. This time, make the slit about 4 inches (10.16 centimeters) tall. This will give you enough space to tuck the towel lining instead.
Cut notches into curved edges of the pad. This will help reduce bulk.
Tuck the towel liner into the flannel liner. Simply slip the towel liner through the slit, and into the flannel cover. Smooth out any bumps or buckles.
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