The OLFA RM-CG-01/GRY double-sided rotary mat offers a self-healing surface for quilting and craft cuts with rotary tools while keeping tables protected. The 12 in × 18 in (305 × 457 mm) size includes precise grid markings on one side and a plain reverse for general trimming and pattern work. Its double-sided layout lets you switch between measured cutting and quick trims without moving your project.