For this design I've taken the "Strophalos of Hecate" or "Wheel of Hecate" and surrounded it by two inward facing crescent moons to represent the Dark of the Moon.
I've made it in American standard whole sizes 4 to 15. I did not make half sizes.
2.028 w x
2.034 d x
0.798 w x
0.801 d x