Average weight 6.5 grams Metal: Silver <-- Split -->Diameter 51.2 x 64.9mm. Width 3.0mm Width of feather head 7. 8m m 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.