Saim Round Office Magnets Kitchen Magnets Refrigerator Magnets Fridge Magnets for Magnetic Message Whiteboard 24Pcs Perfect for pinning photos and notes to the fridge, door, cabinet, locker, cubicle, map, calendars, message boards Strong magnets, can hold thick photo or several pieces paper steady Warning: Keep it away from your pets or children under 3 years old, it's dangerous if thyey swallow the megnet parts Diameter - 40mm/1.6" Outside Diameter; 29mm/1.1" magnet diameter. Please kindly check the size before place your order, make sure it will serve your purpose, thanks