Gender: Men Style: Retro Fashion Material: Titanium steel Treatment: plated gold and plated black Categories: Ring Style: Geometrical ring zise:4mm(for woman);6mm(for man) USA Size: 5 to 15 US Size5 diameter 15.4mm perimeter 47mm US Size6 diameter 16.2mm perimeter 51mm US Size7 diameter 17.4mm perimeter 54mm US Size8 diameter 18.2mm perimeter 57mm US Size9 diameter 19mm perimeter 60mm US Size10 diameter 19.8mm perimeter 62mm US size11 diameter 20.7mm perimeter 66mm US size12 diameter 21.5mm perimeter 70mm US size13 diameter 22.3mm perimeter 74mm US size14 diameter 23.1mm perimeter 78mm US size15 diameter 23.9mm perimeter 82mm