Base ring is Continuum Sterling Silver with a solid 14K Yellow Gold Eagle Globe and Anchor. The Ring face is approx 3/4" tall (20mm) with a 16mm tall Eagle Globe and Anchor. Continuum Sterling Silver has a hardness of 150 on Vickers hardness scale, while normal Sterling Silver is 75. Higher the number, the more durable. Optional ring bases are 10K, 14K, 18K white or yellow gold or Platinum. If ordered as 18K Gold or Platinum, the Eagle Globe and Anchor would then be 18K gold.