The center handmade glass bead from Italy is 30mm. Also from Italy are the red square beads (3/4″) and mustard-colored bicone beads (large – 20mm, small – 15mm). The round Black Agate beads are 13mm. All the beads set in Sterling Silver bead caps and separated with Sterling Silver beads (6mm). Bead caps are not on the smaller red Tibetan beads (1/2″ long, 10mm in width). The 22″ necklace closes with a special Sterling Silver box clasp that I had in my collection.