I’ve just bought some from Planet Fear in Keswick. Similar price to CRC at the moment. I’m a 41 in the 5-10s and specialized BGs but a 42 in Shimano if that helps.
Now just waiting for my superstar nanos to arrive to try them out!
Agree with last post; fine with normal socks but I’d go up half a size for thicker socks like the sealskinz.