This genuine, Edwardian, 18ct yellow gold, double Snake Ring is all original and a genuine antique, hallmarked Birmingham 1918.It boasts a beautiful, rich blue Sapphire in one snake's head and a superb clarity Diamond in the other.The Diamond is an 0.20ct old cut wit superb clarity and colour - SI 1 clarity and H colour, with tremendous sparkle from each of its 58 facets.The Sapphire is also 0.20ct - a rich, royal blue which is the favourite colour of 50% of all people - men as well as women.In very good condition it looks superb when worn.It weighs 6.1 grams.UK Size is S and USA Size is 9.25 - It would resize. The dimensions are 20mm across and 12mm down - that's just less than 1 inch by approximately 1/2 an inch.The shank is 6mm wide - approximately 1/4 of an inch. Old Code 6885.