FWIW in some shoes the half sizes (eg 43.5 rather than 43) are built on the same sole moulding as the smaller size, just with a revised upper. You can tell if this is likely the case by careful measurement. In some cases it is more obvious; the '.5' bit either isn't marked at all on the sole moulding or is marked in a very different typeface or something.
Needless to say sometimes the half size is noticably wider and sometimes it isn't.
Thanks Brucey, I hadn't thought of that. As far as I can tell, there are no markings on the sole moulding for my existing Specialized Torch shoes. I can't measure the shoes without ordering them in, either through my LBS or online, as my LBS doesn't stock half sizes, though I guess I could just return them, if they're no wider. I'm just concerned that 44 are going to be
too much larger.
BTW what other makes of cycling shoes either come up quite wide (not Fizik, I'm guessing!) or have specific wide options?