Arataki Itto's Belt buckle, modeled after screenshots. In its current state it's only usable as a decorative piece, not as a means to close a belt. I'll probably update the design once I get my hands on Itto's ingame model if there's a notable difference.
If my screenshot measuring tribulations are to be trusted, the buckle's canonical hight from horn tip to chin might be around 15 cm (5.9 in). However, since we're dealing with stilized body proportions, it might be a good idea to check whether you really want to go that big for your cosplay. The unaltered model measures ~12 cm (4.7 in) from horn tip to chin rn.
Update: I added a version with separate horns and teeth that may print easier. NOTE: I have not yet printed and troubleshot this version as of now. If there're any problems, feel free to contact me.