Polka Dots Magnetic Blank Cards Accents from Teacher Created Resources add instand appeal to your classroom. Decorate your whiteboard in a snap with durable, reusable magnetic decor. Add style to any magnetic receptive surface such as doors, desks, shelving, and bins. Measures about About 3" x 2½". 5 colors. 18 pieces per pack. Measures about 3" x 2½".