These Bi-Office round magnets are designed for use with whiteboards, planning boards, and other magnetic surfaces. Each magnet measures 25mm in diameter, providing a practical solution for securing documents, notes, photos, or visual aids during meetings and presentations. This set contains 10 black magnets, offering a consistent and professional look for office, school, or home organization environments. The compact design ensures they remain unobtrusive while providing sufficient holding power for standard paper items.