3rd Degree Masonic Blue Lodge Ring 10KT or 14KT Gold, Open Back or Closed Back #705. Available in yellow or white gold. Plumb and trowel on the sides of the shank. .03CT diamond. The top (I call the head of he ring) is approximately 15mm by 18mm or about 19/32nds by 45/64th inch. These are beautiful rings made by a high quality jewelry manufacturer. They are heavier than most rings made by our competitors. Expect to pay much more when purchasing this ring from a quality jewelry store!