tactics baord Magnetic Backing: The flexible coaching board with strong magnetic backing could be firmly attatched magnetic whiteboard, fridge, locker or any iron-containing surface. Large Size: Half court size is 17.5 x 22 inches, full court size is 22 x 35 after splicing the pieces of together. Our large whiteboard ensures that your plays and instructions are visible to all players. Dry Erase Surface: The reusable dry erase sheets with nano-coating surface can be wiped off and updated quickly, which allows you to use them over and over again. Portable: Flexible material allowing you to roll them up and easily carry to classroom, changing room, pitch, court, dugout, etc. Perfect Tool: Great for teaching concepts in classrooms, strategizing and communicating with your team, demonstrating plays in clinics, or even as a visual aid for team meetings. Accesories: 3 dry erase markers (blue black, red) and 1 small whiteboard eraser.