FWIW, I fit the following in this bag:
Lezyne Alloy Drive (with a cartridge in side)
2 extra CO2 cartridges
Rema patch kit
Park CT-5 chain tool
Extra KMC quick link
5mm hex wrench
6mm hex wrench
Presta-Schrader adapter (just in case; it takes up almost no room)
2 tire levers
It's a tight fit but it does all go in there.
Here's what's in my jersey:
2nd spare tube
A couple gels if I'm riding 50-60 miles
3rd Water bottle
I ride way out in the boonies and if that stuff can't get me home I'm calling for someone to get me.