Quilt Stencil Heart Knot. These stencils are useful in so many ways. Use them for quilting, on walls, curtains, furniture, or clothing. Made from plastic, they can be used over and over again and can be easily cleaned using soap and water. These stencils vary in size from 1″ to 13″ and come in a variety of patterns, including flowers, hearts and intricate border designs. So no matter what you use them for, whether it’s quilting or other crafts, these stencils are sure to come in handy more than once.