Green Lantern Ring based very closely on the current movie version.
The centre has a recess in which I have added a green Swarovski crystal (obviously not included if you order the ring here) and is available on Etsy here: http://www.etsy.com/listing/80286595/green-lantern-ring-youth-or-small-size
The ring is small - 14.1mm inside diameter and would be suitable for a youth or someone with thin fingers.
Many other sizes in my shop.
Contact me if you'd like a larger size.