Dry Erase Refrigerator Calendar Magnet 11" Tall x 17" Wide 11" Tall x 17" Wide Magnetic Dry Erase Calendar Super Strong Magnetic Sheet sticks to any steel or magnetic surface. Roughly the same thickness as a dime. Extra day boxes, 37 total, accommodate every month of the year without having to double up Wonderful dry erase material can be used with dry or damp erase markers Erases clean every time - Made in the U.S.A. by OptiMA Inc.