Boots are pretty standard now a days. Obviously you can find your own size...I've found almost all boots are pretty consistent as far as that goes. What differs in most boots is foot width esp in the toe box and ankle hold. So if you have wide feet, narrow feet, narrow ankles, etc. we could tell you what boot would best suit your feet from our experience. For example I have narrow feet (AAA) and narrow ankles and I found that the Vans Andreas Wiig II and the Vans Cirro were snug in those areas. As opposed to Celsius Climate and Celsius Cirrus which had more width in the toe box.