As always, I will highly recommend a visit to your trusted boot fitter to help determine which boots can work best for you, especially when it comes to the fit of a touring boot.
Overall, the fit of the Zero G Tour Scout W works really well for my low-volume foot. As mentioned in the Flash Review I posted, the initial fit had me a little skeptical that I was going to be able to tour comfortably, because of my first impression of how short and snug the toe box felt. For reference, I measure a 25.5 fully weighted, and typically wear a 24.5 comfortably, so long as I support my arches and account for my rigid ankle dorsiflexion. I have a finicky foot, so I quickly resorted to my go-to modifications, to see where this left the overall initial fit. I added my low-volume, custom insole for touring, and around 3° of ramp angle. Immediately, the fit of the boot provided a nice even snugness, and I was still able to wiggle my toes.
After 10+ days in the boot, including some all-day tours, overnight camping, and long days standing around for my AIARE 2, I have been impressed with the overall comfort and snugness provided by the Tour Scout W; I have found it to offer the right balance of both. When in walk mode, I still notice a bit of closeness from the top and front of the toe box, and while this is something I am quite used to, I have a feeling that, for some people, this type of fit in the toe box would feel a bit too tight for a touring boot. The boot sole measurement itself (283 mm) is a few millimeters shorter than most size 24.5 boots, though that doesn’t necessarily speak to the length of the interior clog itself. Regardless, for people who fall in between boot sizes, it might be wise to try both sizes on.