This single Sunflower is very bright, cheerful and large, nearly 2 inches across (40mm). It is not only striking, it is ready to work, with strong, surprisingly thin magnets to keep your workspace workable, a powerful combination. 2 larger (12mm) magnets are included with each minder: one magnet is affixed to the back of the flower; and one magnet needs to be fixed to your work surface. These, like all cover minders from Diamond Art Emporium, have a replacement guarantee in the unlikely event of magnet failure. You'll get replacement magnets or a new cover minder at no charge, very simple.