I'm usually a size 7.5 in adidas footwear, I sized up half a size for these and they are very comfortable and tight at the same time, by far the best climbing shoes I've owned.

I have a very old pair of fully laced Scarpa climbing shoes which are really comfortable to wear on long routes but sadly no longer grip. These are a superb replacement. Very comfortable (once I got the right size (I’m normally an 8/9uk but eventually got a 10 in these - I do have wide feet)) and the grip is fantastic, smearing and edging as you’d expect from 5.10.