These custom heavy-duty circle tarps are popular for a wide range of uses. Our tarps are made to order and ship within 2-5 business days (typically). These are finished size tarps (tolerence of +/- 2"). They are made to withstand heavy usage in many industries and are used for a wide variety of applications. To start, all of our seams are heat welded to provide a durable and waterproof seal. We use industrial double needle lockstitch machines to hem and use special UV treated outdoor thread and a short stitch length when sewing to ensure maximum strength. We use #3 heavy duty rolled rim brass grommets every 24" (unless otherwise specified in the builder). If you do not see what you need, please contact us to discuss the other custom options that are available. We work to keep our lead times short and always expedite orders when possible.