The Royal Crest medallions (sold in pairs) are about 0.602
inch diameter, which is clost to 15mm or slightly under
5/8 inch. They lend a bright, eye-catching appeal to the
grips, and are equally suitable for British and European
guns of today and vintage reproductions.
The Russian 44 S&W revolvers look nice with this medallion,
which isn't specifically of any given country but looks
like most of the Imperial crests of the time.