A fish measuring device includes a flat, flexible base and an elongate, flexible tape measure secured to the base. A fish is positioned atop the base and the base is wrapped around the fish to inhibit its movement. Releasable fasteners maintain the base in the wrapped configuration during the measurement. The tape measure is extended into parallel, overlying relation to the fish so that the length of the fish may be measured. At least one stiffener is disposed in sliding engagement to the tape measure and is held in a vertical plane near the head of the fish. The tape measure is held taut from an exit point of the stiffener in parallel relation to the fish so that the measurement can be made. At least one suction cup is formed in a reverse side of the base so that the base is releasably secured to a flat support surface.
