The 8-1/2 x 18-1/2 inch workhorse ruler spans standard rotary cutting mats while remaining 25% more compact than the 24-1/2 inch version for easier handling. Wide width excels at squaring corners and borders. Dual-marking system lets you cut whole inches using black numbers on white dots with 1/4 inch grip sides, or add 1/2 inch seam allowance using white numbers on black dots with 1/2 inch grip sides. Comprehensive angle markings include 45 degree lines (black for half-inch increments, white for whole-inch), plus 30 and 60 degree angles for flying geese, on-point squares, and cross-hatching. Center crosshairs simplify fussy cutting of stripes and borders. Black and white 1-inch grid with 1/8 and 1/4 inch increments ensures precision. Exclusive gripper technology holds fabric securely during cutting—slide freely until pressure is applied, then grip prevents slipping and miss-cuts. Scan the QR code on the ruler for feature tutorials. Also available in 12-1/2 inch and 24-1/2 inch lengths.