Omnigrid 8-3/4-Inch by 11-3/4-Inch Gridded Mat One side features a medium green background with bright yellow grid lines and the other side features a solid grey without grid lines Both sides feature a forgiving surface and will not damage your rotary cutter The grids on these mats feature-inch markings to the 1/8-inch and a full surface grid with 45 degree angles as well Mat measures 11-3/4 by 8-3/4-inch with an 11 by 8-inch grid