This is for 1 pcs. Olfa Gridded Cutting Mat Set-35"X70" Clipped. OLFA-Gridded Cutting Mat Set With Clips features 3 mats that clip together to form 1 mat that measures 35 x 70. Perfect for larger projects and the seamstress. Single mat measures: 23.3 x 35. Includes 4 clips to make the cutting surface larger. Made of the same high quality self healing material. Markings are 1 grid on all 4 sides 1/4 hash marks on all 4 sides and 8 bias diagonals. Convenient storage size when not clipped together.