There is specific quilting mylar or plastic with a grid pre-printed I've gotten from Michael's (or any craft supply store). If you can't find it in the sewing section, go to the stenciling section and just buy plain mylar sheets. They're used for making your own stencils and such but I use them for quilting templates as well. Make sure you have a good ruler. Nothing beats cutting strips and simple straight lined shapes like a good plastic ruler. Mine is by Martha Stewart and I love it. If you can't get your hands on mylar or basic templates lemme know! PM me and I can send ya some :D