These lanyard Beads are 5/8" or 3/4" diameter which is noted in the drop down menu, with a 1/4" Hex center hole. These beads are a new addition I'm excited to add being they can be paired up with various tools and knives not just my products. However I'll be doing various finishes on them in pairs with some of my tools here and there. When in stock please see the drop down menu for material and finish. Thanks !