Has anyone else had issues with getting the sizing right for standard fit X-talon 212's?

I bought a new pair this weekend. In the shop I asked for 10.5 as this is what I normally wear (and the size I had for my old mudclaws and roclites). They were too short so I tried a pair of 11's which were much better but after running downhill in them for the first time I think they are still too short. This would mean I need a full UK size bigger than what I normally order for shoes (and have ordered previously from Innov8). When I hold them against my other shoes they definitely look shorter.

Has anyone else experienced this?