Hallmarked 9ct Yellow Gold Emerald & Opal Eternity Ring Size M 1/2, N 1/2, O 1/2
9ct = 375 = 9k = 9kt. Gold & Platinum Purity Reference Platinum = 950 = PT950 = Plat. UK Ring Size : M 1/2, N 1/2, O 1/2. US Ring Size : 6 1/2, 7, 7 1/4. Ring Size International Conversion UK D = US 2.25 = EU 41 (12.84 mm).