For the real answer contact SAILRITE.com. They specialize in pieces and parts for all things sailing but also kits, sewing machines and supplies. Since they service a DITY populace, they know what us folks need, including needles, even for machines not their own. I'm planning on building an A-sail from kit next winter. When spread out, it will fill my living room, half the kitchen, and go down half the hall to the bedrooms. As you can guess, it won't BE spread out.