The design of the ring will affect how it fits as well. If the ring is solid and wide it might fit more like the next size down. If it is hollow it might fit like it is a bigger size etc. It all depends on the ring design and the shape of your finger.
VINTAGE N.A. SOUTHWEST LONG TURQUOISE RING SIZE 7.5 STERLING
It is a size 7.5.
VINTAGE SOUTHWEST N A TURQUOISE RING SIZE 6.5 STERLING
It is a size 6.5. The stone has a lot of mica. It is set into a solid bezel, with accents surrounding it. Weight is 6.4 grams.
N A Huge Turquoise Ring Kee Begay Size 11 (19.5grams)
Kee Beegay. 19.5 grams.
3.2g Authentic Baltic Amber 925 Sterling Silver Ring Jewelry N-A7366 s.6
Gemstone(s): Authentic Baltic Amber. Total Weight: 3.2 grams (including gemstone & silver).
VINTAGE SOUTHWEST N A GREEN TURQUOISE RING SIZE 7.5
It is a size 7.5. This is probably Cerrillos turquoise. Stamped sterling, and tested sterling.
3.29g Authentic Baltic Amber 925 Sterling Silver Ring Jewelry N-A7369A s.8
Gemstone(s): Authentic Baltic Amber. Total Weight: 3.2 grams (including gemstone & silver).
VTG SW N A TURQUOISE CLUSTER RING. VERY OLD, SIZE 5.5 STERLING
It is a size 5.5. There are 7 very tiny snake eye pieces of turquoise in a cluster.
2.33g Authentic Baltic Amber 925 Sterling Silver Ring Jewelry N-A7394 s.7.5
Gemstone(s): Authentic Baltic Amber. Total Weight: 2.33 grams (including gemstone & silver).
5.43g Egg Yolk Authentic Baltic Amber 925 Sterling Silver Ring N-A9366 s.5
Gemstone(s): Authentic Baltic Amber. Total Weight: 5.43 grams (including gemstone & silver).