Includes 3 - 23" x 35" green self-healing professional quality rotary mats with clips to attach securely together. Ideal for covering and protecting large work surfaces. Specially designed for use with OLFA rotary cutters. Double-sided with yellow guidelines on one side, solid on opposite for general cutting. Rotary mats protect your work area and help extend the life of your rotary blades. 1.5mm thick for a variety of applications.