The Release Ruler provides the estimated weight of Bonefish based on length. The contrasting color combinations provide easily readable measurements for a quick release. Don't have a scale handy? That's ok, after an exhausting battle the last thing you want to do is hang your bonefish on a scale. The species specific ruler will allow you measure, remember and release your trophy catch. Stop guessing! Use the Release Ruler today. The ruler is made from a durable PVC stiff enough to lay flat on deck and still be rolled up easily for storage. The Bonefish Release Ruler measures 3 3/8” x 36”.