Belleville Hot Weather Boots – Tend to run about a ½ size large so if for instance you measure at a 10.5R I would recommend you order a 10R
Belleville Temperate Weather Boots (waterproof but not insulated) - Tend to run ‘true to size’ so if you measure at a 10.5R we recommend you stick with that size
Belleville Cold Weather Boots (waterproof and insulated) – Tend to run about a ½ size small so again if you measure at a 10.5R we would recommend you order an 11.0R
Tactical Research by Belleville, these boots are produced on a European last and so as a whole, the line tends to run anywhere from a half to a whole size large, I often recommend customers order a whole size down with the exception of the TR960ZWP where I recommend a ½ size down due to the waterproof lining.
Of course all of the above is just ‘recommendations’ based out customer feed back, each persons personal taste for how snug or loose they like their boots will certainly effect the outcome.