I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. tie tack/bar: 2.60" x 0.52" (approx. 2-5/8" x 1/2" or 65.5mm x 13mm). collar bar: none. 0.25" = 1/4" or 6mm - pretty small for standard button holes.
Rubber Duck Vintage Tie Bar Clip ducky derby races n16
Vintage Large 925 Sterling Silver Jesus Christ Crucifix Cross Pendant for Men Women Silver Tone
2-5/8" Curled Ends Gold Tone Vintage LARGE Collar Bar L197
FOE Fraternal Order of Eagles Vintage LARGE Tie Bar Clip
Vintage Large Silver American Southwestern Inlay Turquoise Stone 13.5 Size Ring
2-5/8" Thin Design Genuine Tiger's Eye Vintage LARGE Tie Bar Clip simple plain