Now that I've had this unit on my shelf next to my other infantry units and been looking at it for some time, I can say that there isn't much of an issue with model bulk. They might be slightly slimmer than the GW miniatures, but not to the extent where it'd be noticed at a glance. Using GW weapons and shields on these guys does quite adequately bring them in line with the rest of my collection.
But then, the other models in the comparison are 6th edition state troops, models that should have thicker limbs simply due to wearing loose-fitting puff and slash, while the Imperial Guard wear tight-fitting plate. A much less favourable comparison would be to something like 5th edition Reiksguard Foot Knights, but I'll rather say that it's those who are too bulky. Heck, looking at those models, it's like they are wearing armour measures in centimetres rather than millimetres of thickness, armour comparable to the first tanks in existence.
