The two-piece mat has a non-slip stationary bottom layer and an interlocking green top rotary mat with yellow grid lines and markings which rotates 360 degrees smoothly on the stationary base. Simply rotate your work on the mat to keep your cutting angle directly in front of you. Perfect size to take to class where you may not have a lot of room. This 12x12 inch package contains one 12x12 inch rotating self-healing rotary mat. Imported. OLFA Spinning Rotary Mat 12" x 12"