Personally think that the Moray boots are looking quite funky and would be interesting to be an on feet video of those!
They are all made with Ridgeway outsoles and as a general rule, take true to size as your sneakers or half a size down from your sneakers.
For example, if you wear US 12, UK 11 for sneakers, so with same size, but if you know that you have a narrow width or if you would like to wear these with dress socks only, go with US 11.5 or UK 10.5.
Check out my Master Size chart for more information about Crockett and Jones.