This is Tiffany & Co.'s Ring.
Brand name: Tiffany & Co.
Model name: Dots Ring
Size
Ring Gauge: No. 9.5 External Dimension: 20 mm (0.79 in) Inner Diameter: 1.6 mm (0.06 in)
Depth: 4 mm (0.16 in)
Weight: 7.1 g
Accessories
Outer box, inner case
Material
PT950

Condition Guide:
S: Like new by the store's standards
SA: Almost unused, overall pristine
A: Excellent condition
AB: Great condition, minor signs of use
B: Good condition, signs of wear from normal use
C: Noticeable scratches, dirt, or signs of use
D: Heavily damaged or in need of repair
Item with difficulty being called C: