An octagon shaped signet ring such as this ladies signet ring is a really unique jewelry piece. Most signet rings have a square, round, or ovular shape to them so a signet ring with an octagon face has a particularly novel appeal. The octagonal face of this ring measures about 13.9 mm x 13.7 mm and can fit a single initial or up to three initials into the 14kt gold metal. This piece has an open back which allows it to weigh about 7.4 grams in weight despite it being more of a chunky ring due to it having less gold.