Tanjiro Hanafuda no Mimikazari 炭治郎の花札の耳飾り(鬼滅の刃 / Kimetsu no Yaiba DEMON SLAYER)
Printing Model of Sum Nail is printed by DMM.make 3D Print service.
It is Titanium earrings.
The author marked this model as their own original creation. Imported from Thingiverse.