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 they swallow the magnet 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 These round magnets are perfect to be used on fridge door, cabinet, office cubicle. Add fun to your decoration, hang a photo for display, project presentation, notes, files and memos!