In order to make a silicone mermaid tail, sew a thick, nylon spandex-like fabric around a monofin. You need a monofin, some cardboard, a marker, a needle, like-colored thread, a set of pins, a pair of scissors and plenty of silicone-coated fabric, such as nylon spandex, to cut the shape of your legs out twice.Continue Reading
Sit down on top of the cardboard with your legs stretched out. Secure the monofin around your feet. Use the marker to trace the shape of both the monofin and your legs, all the way up to your waist. Cut the cardboard out along the traced lines.
Fold the silicone fabric in half, and leave the side of the fabric that you want to be visible facing up. Lay the cardboard cutout on top of the fabric, then trace the shape onto the fabric. Ensure that you leave a 2-inch wide leeway around the shape. Pin the two halves together to make sure that they remain in place around the leeway mark. Cut the fabric around the leeway mark, and then leave an extra 2-inch leeway at the top of the waistline.
Secure the fabric around the monofin. Use the needle and thread to sew the two halves of fabric together around the pinned areas. Sew the fabric around the monofin securely. Attach a zipper to the waist to adjust the way the tail fits around the waist easily.