RM1 4/4 MAPLE RM1 4/4 grade is ideal for finger-jointed panels and specialty items such as chair and table legs. MAPLE RM1 4/4 grade admits all boards with 24 inch (60.96 cm) surface measure and over. Lengths:  76 inches (193.04 cm) with some shorter boards developing. Widths:  3 3/4 inch (95.25 mm) minimum Minimum Size Cuttings:  2 inch (50.80 mm) wide by 24 inch (60.96 cm). Overall Minimum Yield: 50 percent clear 2 face cuttings.