This is the perfect size bag for fitting all required roadside fixes. Room for a spare tube, tire irons, large multi tool, 2 x CO2 cartridges, CO2 inflator, patch kit, and tire boot. The strap could be a bit wider.
I like everything about this bag. It's nice and roomy and easily fits all my stuff. Good zipper. Love the light loop. IMO, it would be a perfect bag if it also included a seat post strap.