Marlin Ruler (Metric)


The original Marlin Ruler(Metric) by Release Ruler measures both Blue & Black Marlin.

  • DIMENSIONS – the Metric Marlin Ruler measures fish in centimeters and can measure marlin up to 380cm in length
  • ACCURATE – Made from a PVC vinyl material which is dimensionally stable.
  • FISH SCALE – A bonus feature is the patented weight estimation based on the growth scale for marlin. No other ruler offers this innovation.
  • VIVID COLORS – our award winning graphic design offers fisherman the quickest ruler measurement, highest fin to ruler contrast and the best option for catch, photo and release.
  • Perfect Fishermans Gift
  • Made in the USA
  • Easy to use
  • Measure tournament minimums
  • Never guess weight again
  • Heavy duty long lasting
  • Non Corrosive
  • Endorsed by The Billfish Foundation
  • Measures in Centimeters
  • 100% Satisfaction Guaranteed



The Marlin Ruler (Metric) was primarily created for catch and release although it is popular among sportfishing enthusiasts to measure minimum tournament regulations while the marlin is swimming boat side. You simply place the Marlin Ruler over the lower jaw region of the marlin and read the measurement at the fish’s tail-fork. The Marlin Ruler is heavy duty PVC vinyl which is also water resistant material. Tagging fisherman will love getting a more realistic measurement versus guessing weight and length. Eliminate the need to harvest a marlin for the sake of weight! Use the patented weight estimating Marlin Ruler today. 100% Satisfaction Guaranteed. For comments and questions contact



Additional information



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