The inner diameter of the hoop is 8mm. The hoop wire is 20g (standard ear wire) and will fit any standard piercing. The squared hoop is 1.5mm x 1.5mm.
You can wear this hoop as a single helix cartilage hoop or you can select to purchase a pair and wear them as a standard lobe earring. These can also be worn as an ear cuff if you don't have