Balloon Dry Erase Magnets (12 Pack) Use these Balloon Dry Erase Magnets to decorate your whiteboard or showcase outstanding work! A handy classroom management tool, teachers can use these dry erase magnets for study sessions, lesson plans, creating groups and more. Includes two of each color: red, orange, yellow, green, blue and purple. Find even more classroom supplies on Amazon! Vinyl. 4" x 6" Store flat for best results. Pack of 12.