Originally Posted by gokiburi
i've got double socks now (ankle socks over wool knee socks..or argyle when the weather permits but that's another story..) which fit well in my current road shoes. i don't have thin cycling socks but i should probably get a couple pairs for warmer weather riding. i've tried size 41 sidis before and the fit was ok. hindsight being what it is, maybe i should've got a 41.5 or a non-narrow 41. fack, i hope they stretch out enough.
if you've got two pairs or socks on now, then in the summer/spring with thin socks they should fit fine. FWIW i wear woolie boolie socks from MEC (or another wool equivalent) in my sidi dominators and they fit fine. with cycling socks they are a bit too roomy so you'll notice a difference if you wear something thinner. are you using the sidi insoles? try putting them in if you aren't they make a big difference in fit as well.