SINGLE OR PAIRS OF TUX STUDS TO REPLACE MISSING/BROKEN PIECES OR ADD TO YOUR SET FOR NEWER STYLE SHIRTS. shirt stud: 0.88” x 0.99" (approx. 7/8" x 1" or 22mm x 25mm). Condition: good, stud slide is smooth & spring consistent - SEE PICS - (Hi resolution photos typically show more detail than is visible to the naked eye).