In reply to Halo Le Fish:
I've got a pair of camp XLC 390s (As far as I can tell, they're the same shape as the ones you're looking at) and they fit my size 29 maestrales really well. The strap is at its longest, but it's not too much of a fiddle. I've not used them in anger though, and would certainly be wary of using them on ice and mixed. Can't comment on how the steel points on the others might be more sturdy.
The camp shape seems to fit these boots well, my other crampons are a pair of cheap Camp steel jobbies and they were a good fit for ice climbing the one time I tried it.
Hope some of that is useful.