Bluefin Ruler


The original Bluefin Ruler by Release Ruler

  • DIMENSIONS – the Bluefin ruler is 2″ wide x 125″ long and can record tuna up to 1000 lbs.
  • ACCURATE – Each ruler is made of PVC vinyl which is dimensionally stable and flexible.
  • FISH SCALE – A bonus feature is the patented weight estimation based on the growth scale for bluefin. 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
  • Measures 2 x 125-inches
  • 100% Satisfaction Guaranteed


The award winning Bluefin Ruler is a must have for those of you targeting the mighty giants of the ocean. Simply lay alongside your tuna and measure. The Release Ruler’s contrasting colors estimate the bluefin’s weight and age based on the scientific growth data. The ruler is durable, tear-resistant, easy to stow and charts weights from juvenile to HUGE! The ruler is made from PVC vinyl, measures 2″ width x 125″ length. Each ruler is true to scale and dimensionally stable. For any comments or questions e-mail: 100% Satisfaction Guaranteed.

As seen on National Geographic’s “Wicked Tuna.”

Additional information


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