4mm Thick Clear Acrylic Slotted Cutting Ruler (45x30cm): 

This Slotted Cutting Ruler is perfect for quilting and general fabric cutting, this durable ruler streamlines your process with several time-saving features:

• Swift, accurate strip cutting: Features 1cm slot increments, allowing you to quickly cut consistent strips.
• Versatile guides: Includes built-in guides for precise squares, diamonds, and A5 sub-cuts into 5-inch charm squares.
• Professional results: Designed for use with a rotary cutter and a self-healing cutting mat, ensuring clean, accurate cuts every time.