Don't worry, that doesn't sound stupid at all! I think it's like Kakashi's but I'm not quite sure. It looks like Kakashi's to me if that helps you at all though.
Sorry I couldn't be of more help! By the way, I think doing a younger Kisame is a great idea, especially because NOBODY does it!! Good luck!!
Cosplays in progress:
Elsa (Coronation Dress) [Dinsey's Frozen]
Mitsukuni "Honey" Haninozuka [Ouran Highschool Host Club]
Pikachu [Pokemon]- Anime Boston 2010
Belle [Disney's Beauty and the Beast]
Hungary [Axis Powers Hetalia]
Tina Belcher [Bob's Burgers]
Hinata Hyuga [Naruto Shippuden]
Rin Nohara [Naruto Shippuden]