any help would be cool
Don't know how helpful these will be, but here's a link to some bandolier photos and measurements on the StudioCreations site, apparently taken at the Magic of Myth exhibit:
Studio Creations: "Magic of Myth" Bandolier Measurements
Also you might like to check out the "Chewbacca Costuming Resources" on the Rebel Legion site. If you don't already know about it, this is a pretty good resource of Chewy-related information:
rebellegion.com: Chewbacca Costuming Resources
Good luck!