The White Marlin Release Ruler measure 2″ x 90″ and is made from a durable PVC coated fiberglass. The White Marlin Release Ruler not only measures length but also the estimated average weight in 10 lb. increments. Place the ruler to the tip of lower jaw, then measure the fork length. The ruler comes equipped with over sized grommets on each to attach easily to a tag stick or gaff. It's a must have for the Canyon fisherman in the Northeast. Measure your own trophy and let the ruler do the talking.