(SINGLE OR PAIRS OF TUX STUDS TO REPLACE MISSING/BROKEN PIECES OR ADD TO YOUR SET FOR NEWER STYLE SHIRTS. 3/4" or 18.5mm). 0.25" = 1/4" or 6mm - pretty small for standard button holes. 0.50" = 1/2" or 12.5mm - this is fairly large for standard button holes.
