Gridded Magic Whiteboard is a supercharged whiteboard on a roll that sticks with static to any flat surface. Simply roll it out, tear off a sheet along the perforated line and place it on the wall. 65 feet of gridded whiteboard are included in every roll in 25 perforated sheets that each measure 31.5 x 23.5 Inches. Each square of the grid measures 1 x 1, with 24 grid squares across and 32 squares down on each perforated sheet. Gridded Magic Whiteboard is made of a statically charged polypropylene sheet. You can take down your gridded sheet and put it back up again many times without it losing its static cling. You can roll out as much Gridded Magic Whiteboard as you want to create an entire whiteboard wall, or tear off an individual sheet that can be used over and over again. Write on Gridded Magic Whiteboard with standard dry erase markers or permanent markers.