
I'm a size 7.5 and had the same problem when I wanted a pair of Invernos.
It's well known that Sidi make narrow shoes and so I went for an equivilent size 8 (ie size 43) to make sure they'd accomodate my not exactly slender feet. Result is a well comfy shoe that's ever so slighty too long but you don't notice it when rding.
Are these summer or winter shoes, ie do you want to fit a decent sock in there as well?