The Fisherman's Ultimate Knot Guide has the ten best knots to cover every fishing situation. The easy to read drawings are printed on waterproof plastic cards, which fold out to a 12" ruler to measure your catch. Includes the three best knots for terminal tackle connections, the two best leader to line knots, the two best line to line knots, and the three best loop knots. Knots include, Improved Clinch Knot, Palomar Knot, Uni Knot, Surgeon's Knot, Double Uni-Knot, Blood Knot, Nail Knot, Surgeon's End Loop, Dropper Loop, and the Perfection Loop. Measure.4-1/4" x 2-1/4" folded.