Most of those rings are made by order because the size of the finger. Bone not flexible as metal. So please contact us for details and for available item. We do custom production so feel free to contact us for your design or idea.

A ring is a round band, usually of metal, worn as an ornamental piece of jewelry around the finger, or sometimes the toe; it is the most common current meaning of the word “ring”. Strictly speaking a normal ring is a finger ring (which may be hyphenated); other types of rings worn as ornaments are earrings, bracelets for the wrist, armlets or arm rings, toe rings and torch or neck rings, but except perhaps for toe rings, the plain term “ring” is not normally used to refer to these.

Rings are most often made of metal but can be of almost any material: metal, plastic, stone, wood, bone, glass, or gemstone. They may be set with a stone or stones, often a gemstone such as diamond, ruby, sapphire or emerald. [source : wikipedia]