2 1/4" - Provide your clients with a clear view of your message on our Round Window Button. The USA-made 1-piece button is both eco-friendly (uses 50% less steel over 2-piece) and features a standard safety pin back. A celluloid cover is placed over the printed graphics, giving the finished button a high gloss, elegant appearance. Customize with a full color imprint of virtually any graphic - PMS color match is free! Also FREE set up and fast delivery!