1.5 inch Pin with dual pin posts. Having 2 pin posts prevents the pin from spinning upside down when you wear it. It also prevents you from losing the pin. Each pin comes with 3 silicone red, white, and blue pin backs (1 extra). 100% of the pins you see for sale are made with cheap painted on enamel but not this one, ours is cloisonné, also known as hard enamel which is not only a much for complex and expensive process, it's also a far more appealing look.