This raven ring has the Epicene Machine band symbol on the head (check me out on Bandcamp shameless plug lol)... I am not sure of the ring size but its 18.89mm on the inside. Honestly I made this as a bass pick ring because I like to play slap base then jump to picking and the pick might as well look hella cool. Yes I do use this as a bass pick and it works good. Just make sure the infill is around 30%
Print it on the bed like shown and you shouldn't have any problems. You don't need to use organic supports but that's what I used.