Mountain Biking - Sidi shoe sizing vs Specialized

Hi, does anyone have experience of both these brands? Every bike shop near here only seems to sell Specialized shoes, which are no good for me as 45 (Euro sizing) is too small and 46 is too big. So on the assumption that I would fit 45.5 in Specialized (which doesn't exist) which size Sidi should I order online to have the best chance of it fitting? I think Specialized sizing must be large as I normally take a 44.

Cheers, Bryan

I fit into 47 in both Specialized & Sidi

Would you say one was slightly bigger (longer) than the other? Or exactly the same?

Cheers

I have both Sidi and Specialized shoes. I wear a 45 Sidi (maybe could have done 44.5) and a 44 in Specialized.

I've found this chart (http://www2.bsn.de/Cycling/shoe-sizing.html) useful...

I have both in a 46 (S-Works Road and Sidi Dominators) and I don't feel a difference in length but the Specialized shoe has more room in the toe box.

Thanks for the replies, and especially for the chart. Looking at it, Sidi sizing looks all over the place! I actually ordered some 45 Sidis yesterday after finding someone who told me that his Sidi 48 was bigger than Specialized 48 - so I thought Sidi were bigger, so their 45 would be a bit bigger than the Specialized 45, ie just what I was after. But from the chart, Sidi are only bigger after 47, before that they're smaller!! Looks like I'll be coughing up for return postage :(

The chart appears to be off. I have a pair of Specialized BG Comps, and on the box it says 12.5 USA/45.5 EU.

44 sidis and 43.5 specialized here