The OLFA RM-SG double-sided rotary mat is sized for quilting and crafting tasks that need more room for blocks, strips, and templates. The 18 in × 24 in (457 × 610 mm) self-healing surface includes a marked grid for precision work on one side and a solid reverse for everyday cutting. Use with rotary blades to protect your workspace and keep long cuts aligned across larger pieces for consistent repeats.