I'd be interested to hear what y'all use to carry your stuff. The chest pack I use is about 10"x10". To be truthful, it's larger than need be. As much as out of force of old habits, I still carry around 4 small fly boxes. I can't remember the last time I opened three of them. I pretty much have all my go to flies in one box and that's the only one that gets used. I also carry a pair of rarely used hemostats, a bottle of floatant, and a spool or two of tippet.