The award-winning Chinook “King” Salmon ruler is a must have for those of you targeting the largest of the salmon species. Simply lay your ruler alongside your salmon and measure. The Release Ruler’s contrasting colors estimate the salmon’s weight based on the scientific growth data. The ruler is durable, tear-resistant and easy to stow. The ruler is made from PVC vinyl, measures 2″ width x 125″ length. Each ruler is true to scale and dimensionally stable.