Huge chunk of Mountain t Turqouise solid heavy sterling’s silver. Not adjustable and set for a size 5. Unfortunately, at this time, I cannot offer any sizing of the rings over a 1/2!size MAYBE MOREz I will be able to offers using to any ring coming very soon. Additional fee will apply. In. The future, for this purchaser, since there is a wait. Sizing fee will be waived. Get your ring now and we will hold it for you till the ring sizer arrives. Shouldn’t be too long. Jn. The hallmark of a piece of Native American jewelry, specifically from Navajo artists M&R Calladitto. Signature in this ring is amazinng! This mark indicates: M&R Calladitto: The artists who created the piece, often Michael and Rosita Calladitto, known for their Navajo jewelry. Navajo: The Native American tribe known for their silversmithing and jewelry artistry. Sterling: The material used, indicating the piece is made of sterling silver.