These round buttons are 25 mm in diameter, and have a loop on the back side. Image of Aquila (two-headed eagle) is casted on the button surface.
In the one of Sci-Fi fantasy universes, Aquila is symbol of unity between Mankind of Earth and Adeptus Mechanicus of Mars. And it also a sigh of loyalty to the Imperium.
Such large buttons could be sewn on foreparts of garment, as well as on sleeve cuffs. We made these Loyalist buttons specially for Sci-Fi fans and cosplayers.