Follow the order process on our website and select “Pattern Shape,” and enter the general (rough) dimensions of the mattress. At the end of the process we’ll tell you how to mail the pattern to us. If your mattress is a standard shape, you can just order by selecting the shape that corresponds to your mattress (usually a rectangle). To make a pattern for a custom (odd-shape) Sprinter mattress grab a large piece of paper, or plastic, and a Sharpie or other marker, to trace the pattern. You can tape several pieces of paper together if needed. Next, trace the exact shape of the mattress, and write important details on the pattern like the thickness of the Sprinter mattress, and where any zippers might go if you’re going to order a mattress cover. Please note if the top and bottom of the mattress are the exact same size, or if one is slightly bigger than the other (known as a “bevel”). If you need a bevel, you’ll need to either make a separate top and bottom pattern, or, clearly communicate on the pattern how much smaller one is than the other. Without a mattress cover, custom pattern shape mattresses usually take 2 weeks from the time we receive your pattern. With a custom-sewn cover, it will likely take 4–6 weeks.