Average weight 12.5 grams Metal: Silver <-- Split -->Diameter 43.7 x 59.9mm. Width 3.0mm Width of balls 8.1mm 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.