The half-figure, slightly turned to his right, is set against a gold background; he wears a green mantle and red tunic over a hair shirt, holds a tied scroll in his left hand and raises his right in blessing. The halo is defined by two concentric circles inscribed into the gold ground. Both the halo and painting overlap the raised border in places. He is identified by a Greek inscription in red on either side of the halo: 'St John' to the left and O Prodromos (`the Forerunner') to the right. The panel has suffered considerable damage from woodworm and has split and been re-joined. The painted surface has been lost from three of the corners.