Shapers Layout Square is the ultimate measuring tool and a essential tool for all Shapers! Clear Polycarbonate 'transparent' sheet which sits flat on surfboard blank; Inches and MM Measurements; Giving accurate centre-finding measurements from stringer to rail. Measure Nose, tail and Midpoint exactly with the printed measurements on the square; Quick layout for Fin Positioning. Also used for tail measurements and fin settings. The Shapers Layout Square - Dims 24" in width | 609mm, 12" in Height | 304mm