Aquamarine Cat Eye Hoop Hangers Material: Opalite glass stone Every size is 50mm in outer diameter, please be aware that this is larger than a typical hoop and specifically for those who want that larger look! The inner diameter will be 50mm MINUS the size you order x 2, so: 5mm = 40mm 6mm = 38mm 8mm = 34mm 10mm = 30mm 12mm = 26mm 14mm = 22mm 16mm = 18mm Select desired size from the menu