In reply to thepodge:
> I know its only a rough guide despite saying its accurate but I cant imagine getting into a 42.5 Solution.
As you say - definitely a rough guide. That said, I wonder if it may be that your feet don't suit La Sportiva based on what you're finding - By way of example, I fit Tarantulas in 41.5 with a street size of 44.5, and take the same size in Solutions, Skwamas and Miuras. The Tarantula is a much less 'fitted' shoe which may explain why you can get away with it without too much issue whereas Solutions are crippling in the same size.
In this situation it's really hard to offer more advice without seeing the shape of your foot etc but I wonder if you might not get a better fit from Five Ten as they tend to offer a touch more room? Although it really is academic without knowing the shape of your foot.
Even within the same brands there is a significant variance in the volume of different models - by way of example the La Sportiva Solution is very much towards the narrow end of the Sportiva shoe range, whereas the Miura VS sits in the higher volume section meaning it is better suited to larger feet.
> Also thanks for telling me I have a Roman foot but what am I supposed to do with that info? You don't list it as an option.
Excellent point - definitely some information we can work more with. Foot shape is generally pretty indicative of what brand of shoe will offer a good fit so we could definitely incorporate this into a feature that offers a recommended brand/model based on toe profile and width of foot. Cheers!