This signet ring is native to Rhino3D. The metal thickness on the sides is 0.8 mm but it is thicker at the top, 1.2 mm to accommodate laser engraving deep enough for resin.
Measurements are in the screenshots, but the current size is 6.5 American and M 1/2 UK. Other sizes available on request at no extra charge.
Estimated weights:925: 2.6 grams9K Yellow Gold: 3.1 grams18K Yellow Gold: 3.8 grams