The 16" Rotating Cutting Mat by Sue Daley Designs is a must have accessory for English paper piecing and is especially useful for patchworkers on the move. With a smooth rotation, this mat is perfect for trimming up your blocks, half square triangles, cutting and gluing your English Paper Piecing shapes, auditioning your quilt blocks and is also a beautiful accessory for your sewing room. The 16" mat is self-healing, rotates 360°, and has inch grid marks.