If your shirt has smaller button holes (such as newer DeRegnaucourt brand shirts), these screw-open studs can accommodate you. Austrian crystal shirt studs coordinate perfectly with our cuff links, number magnets and show earrings. Available in silver or gold finish in 25 colors, or call us at (920) 470-8381 for custom colors. Gift boxed set of four, traditional size of approx. 7/16".