One Collar Bar as follows. I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. unmarked, gold, 1-15/16 ", 3 grams, very good condition. 0.25" = 1/4" or 6mm - pretty small for standard button holes.
This product would be a great fit for vintage clothing that requires cable ties with a distinctive, high-quality appearance.