If its any use.... i take a UK5 in all Sportivas, 5 1/2 in most Scarpa and i think about 7.5 in 5.10 (never actually had a pair but from trying them on i think thats right). And obviously 6.5/7 in Evolv.
They're a pretty narrow fit, absolutely mint on my right foot but baggy on my smaller left.
My street size is 8 1/2 or 9