The Mako Release Ruler measures 3″ x 130″ and is made from a durable PVC. The Mako Release Ruler not only measures length but also the estimated average weight in 100 lb. increments. Place the ruler to the tip of snout, then measure the fork length. The Mako Release Ruler comes equipped with over sized grommets on each to attach easily to a tag stick or gaff. This Mako ruler is also a great tool for measuring minimums in tournaments.