Use our Sail Storage Bag to protect your valuable mainsail, jib or spinnaker. All of our bags are made, by us, in the USA from 400 denier coated nylon oxford cloth and are very durable. All seams are double sewn to make seams secure and the fabric is cut with a hot knife to prevent unraveling. This bag measures 18" Diameter x 42" Length. To measure your sail for fit, fold your sail as you normally would then measure the length and the circumference of the bundle. Please contact us if you have questions.