These Bakelite cookie buttons are the tiniest of their kind and hard to examine without a proper zoom feature. Although I posted triangle and star cookies earlier this month, these are miniature versions of those buttons. They measure about half-an-inch across. If these buttons were any smaller I don't know how you'd work these smidgens through a buttonhole unless you had elf or gremlin fingers. The green one in the middle might be the smallest button I own.