The LeftyQuilt Master Ruler measures 6.5 inches by 12.5 inches and is designed specifically for left-handed quilters. Its mirror image markings ensure that all measurements and lines are oriented for left-handed use, eliminating upside-down or reversed numbers. The ruler features clear black and white markings in 1-inch grids, with increments of 1/8 and 1/4 inch, making precise cutting straightforward. It includes easy-to-read black numbers on white dots, along with 1/4 inch grip sides for cutting whole inches and dashed lines to assist with trimming seam allowances. The Turn-A-Round feature, marked with white numbers on black dots, helps in adding 1/2 inch seam allowances. Angled lines at 45 degrees, 30 degrees, and 60 degrees facilitate trimming half-square triangles, squares, and flying geese units. White horizontal and vertical lines mark the center for fussy cutting. An exclusive gripper holds fabric securely during cutting, preventing slipping. A QR code links to a tutorial demonstrating its features.