Average weight 3.3 grams Metal: Silver <-- Split -->Diameter 36.9 x 45.8mm. Front width 2.9mm Back width 3.6mm Width is width of thickest point along the band, unless stated otherwise. <-- Slit --> Hallmarking Guide: Sterling Silver less than 7.78g not stamped but has a 925 mark. More than 7.78g stamped.