I got mine from Milanoo.com when I cosplayed as Gaara.
I don't know how realistic you wanna get but these come in black, blue, or red (your choice) and have all the villages plus rogue/Akatsuki (symbol w/ slash through it). They're a decent size, meaning not kid size, and have the symbol engraved in the metal as opposed to being painted on. They run somewhere around $3 if I remember correctly.
Emerald City Comic Con 2014:
Quorra - Tron (10%)
Sakura Con 2014:
Razette - 07-GHOST (10%)
Fem! Gijinka! Red XIII - FFVII Original Design (50%)
ANBU Sasuke Uchiha - Naruto Original Design (70%)
DemonForm! Rin Okumura - Ao no Exorcist (80%)
PAX Prime 2014:
Cortana - Halo 4/Forward Unto Dawn (0%)
Aki Con 2014: