...Typically the longest (second) toe is affected but it can be all of them (!),
A bit of a tangent - am no expert on feet, but am always a bit startled to see feet where the great toe isn't the longest as it is in my family.
If the toe box is adequate, the way to prevent toe bang is to make sure the laces over the instep are tight enough to lock the heal in the boot. Sometimes the fit of the boot is such that the foot continues to slide forward regardless of how tight the laces are made. If this happens, sometimes a minor heel-lift will fix the problem. If it doesn't - the boots will probably never fit properly.
