I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. tie tack/bar: 1.66" x 0.53" (approx. 1-11/16" x 1/2" or 42mm x 13.5mm). collar bar: none. 0.25" = 1/4" or 6mm - pretty small for standard button holes.
The "CSN CNTU Logo Vintage Tie Bar Clip university college edu" would be an excellent choice for professional and collegiate settings, such as offices, schools, or universities.
