Measures 0.50? Diameter Our pins are die struck from jeweler?s metal, soft enamel color filled, and epoxy coated. Pin fastens with what is known as a butterfly clutch which is one of the most popular modern methods of attaching pins, also known as a military clutch. The back of the pin has a small prong attached and when the butterfly clutch is squeezed and pulled up from the prong the pin is released from the clutch. Additional Details ------------------------------ Product description: Simple gestures could mean a lot especially when expressing one's ideal and loyalty to your home country. The National Flag Lapel Pins are a subtle way of announcing your patriotic side and yet done tastefully with this single flag lapel pin accessory. Quality made from the best die-struck metal and painted with enamel has protective epoxy dome finish for durability that will last for a very long time. Wear this with your favorite shirt or dress up with your suit for a more diplomatic and patriotic look that anyone will notice.