When originally created the Imperial Service Medal was a seven-pointed star, or a laurel wreath for women, in the same pattern as the Imperial Service Order, but with the star or laurel in bronze.
[3] In 1920 an amendment of the statutes changed the appearance of the medal to its current form of as a circular silver medal, 32 mm(1.3英寸) in diameter, bearing the effigy of the reigning sovereign on the obverse.
[4] To date, here have been six versions:
[5]