"Swedish prog-metal legends OPETH are offering up an exclusive ring. The 925 sterling silver ring is 10mm wide and 1,6mm thick. The "O" logo and "Opeth" logo engraved in the surface on each side so you can decide what way to wear this"
http://www.bandstores.co.uk/shop/opeth/proddetail.php?prod=nmus_opeth_silring
http://www.bandstores.co.uk/shop/opeth/proddetail.php?prod=nmus_opeth_silring