You go with the Radiums? Smaller than normal shoe or bigger?
Seem to find the Radiums fit a size small. I'm not sure yet if it has to do with the way the liner is constructed or it's just perception because of how much support this boot has, but I generally reccommend going up a size with these.
Consensus on the Adrenalines seems to be they fit pretty true to a street shoe size. If you are in the large range of a size, we reccommend going up a size as no half sizes. So far that reccomendation has worked for us.
Either way, if I send you a pair of boots (or anything else for that matter) and it doesn't fit the way you want it to, send it back to me and we'll hook you up with something that does fit. I've shopped over the net as much as anyone, sometimes it's difficult to guess, hence the reason we take anything that's unused back.