This is an attempt of reconstruction of the seal signet ring of the prophet Isaiah, based on the Seal of Isaiah which is a clay seal found in Jerusalem in 2009 with the inscription Lé Ishayah Nabi which means Belonging to the prophet Isaiah. (Also included in the files) At that time, Isaiah was the official prophet under King Hezekiah and it makes sense that he would have an official signet ring. The finger is 18.2 mm