【Colorful Magnets】This magnetic whiteboard magnets include a set of 40, 10 different colors, 4 magnets of each color. Each size: 20 mm outer diameter, 8 mm thick. Note: Please check the size to make sure it will meet your needs. Recommended for children 3 years old and up, and please keep it away from children or your pets. 【Versatile and Sturdy Fridge Magnets】These fridge magnets can be used on any magnetic surface such as refrigerator, dishwasher, microwave, washing machines, lockers, bulletin boards, office cabinets, chore charts, whiteboards, cubicles, etc. Circular magnets are general purpose magnets for school, your office, or your classroom, at work or at home. 【Multiple Uses - Funny Magnets】These magnetic magnets are small and strong enough to keep photos, maps, memos, plans, receipts, notes, pictures, postcards, menus, documents, shopping lists, project presentation on the refrigerator door, whiteboard, locker, cabinet, chore chart, cubicle, etc. Notes and to-do lists on the