Material:Titanium Steel<br />Style: restoring ancient ways/punk/fashion <br />Size:  <br />US7= Inside Diameter 17.35mm= Ouside Perimeter 54.51mm<br />US8= Inside Diameter 18.19mm= Ouside Perimeter 57.15mm<br />US9= Inside Diameter 18.89mm= Ouside Perimeter 59.34mm<br />US10=Inside Diameter 19.84mm= Ouside Perimeter 62.33mm<br />US11=Inside Diameter 20.68mm= Ouside Perimeter 64.97mm