I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. tie tack/bar: 0.91" x 0.51" (7/8" x 1/2" or 23mm x 12.5mm). collar bar: none. I always try to point out any clear blemishes and condition. GOOD - used, showing age appropriate signs of use such as minor scratches and minor wear, no cracks or missing pieces.