I hand fabricate my iris pendant from sterling silver sheet. I cut the design into a top layer of silver with a jeweler's saw and solder it to a backing. The iris is oxidized to darken it, bring out the design. The pendant measures 7/8" wide x 2" tall.
It come with either an 18", 5-strand steel cable or on a nickle bead chain in lengths of 16-24 inches.