A flexible curve ruler is a plastic covered strip traditionally used for drafting, dressmaking, and crafts. It easily bends into graceful curves and holds its shape so it works well for planning bailed teapot handles. Bend the ruler to the approximate desired curve and hold up to the teapot to preview the handle shape. Refine the shape and recheck against the teapot until satisfied. Then trace the curve on a piece of cardboard, cut along the line, and keep the interior portion of cardboard. This will be the support template for the teapot handle.