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.
UPCOMING CONS & COSPLAY PLANS:
Sakura Con 2016:
Rosette Christopher - Chrono Crusade (12%)
Gin - Hotarubi no Mori e (30%)
Yuki Nagato - Melancholy of Haruhi Suzumiya (100%)
Himiko - Btooom! (25%)
Kagura - Inuyasha (100%)
Sasuke Uchiha - Naruto (100%)
PAX Prime 2016:
Aki Con 2016: