Button. Flat. Smooth edge. On a smooth background, around the bottom edge going up either side is a wreath of leaves. Around the top edge is ROYAL MARINES. In the centre is a fouled anchor with the rope tied to the ring and goes diagonally below the left-hand stock to the appear under the right-hand stock, then goes under the shank to the left , then over the shank to the right and finishes over the right arm.