This sterling silver ring is adustable! (approximates size range 5-8). It has a threaded base that will accomodate threaded beads (like Biagi) but it will also fit non-threaded big hole beads. (My silver-cored beads fit snugly, so I don’t think Troll beads would fit.)
Bead shown in photos is for illustrative purposes-it is not included with this ring.