Whiteboard pen holder organizer bags are suitable for holding marker pens, pencils, whiteboard erasers, rulers, scissors and other supplies They are helpful to classify and organize small objects such as marker pen, blocks, whiteboard magnets, and more Wall hanging marker pen holder storage bag There is strong magnet strip on the back of pen pouch, which can be attached to any surfaces, such as refrigerator, whiteboard, locker This pen bag is polyester with strip, sturdy and wear resistant, which can be used for long time marker holder bag for whiteboard, measure about 9.06x5.31inch They can attach to the metal or surfaces firmly