This is a gorgeous Navajo sterling silver adjustable ring with two large pieces of green turquoise. This piece was made by Navajo artist Robert Shakey. The size of this ring is an 8 1/2  as is, but it is adjustable. The whole face of the ring is 2 1/2" tall, 15/16" wide, and 5/16" thick. The two turquoise stones are roughly the same size, 29 mm X 19 mm. There is a lovely silver rope border surrounding the stones, and the band is 4 mm wide. This piece is marked by the artist "sterling", and "Robert Shakey". Guaranteed to be sterling silver. This ring would make an excellent gift! Please let us know if we can answer any other questions, and thanks for taking a look!