24in x 35in self-healing professional quality cutting mat especially designed for use with OLFA standard-duty cutters, heavy-duty cutters, extra heavy-duty cutters, art knives, rotary cutters and specialty cutters. Double-sided with green base color and gray guidelines on one side for precision cutting, solid green on opposite for general cutting. This mat does not contain any numeric markings, including inch markings or numbering. Helps protect cutting surfaces and extend the blade life. 3-layer engineering helps extend mat life. 3.0mm thick for a variety of applications. RETURNS ARE NOT ACCEPTED ON THIS MAT FOR LACK OF NUMBERING.