I'll throw my sizing info in if it helps. The 1950s Service boot runs "big" for me at least with the turned up toe. I am an 8 in White's Classic Work Boots and got a 7.5 U.K. in my Vibergs. They fit but I could have prolly went down to a 7 U.K.
They also run wider for me in the toe box and heel than the White's
Great boot, I love em'