I think they're spot on. I am an annoying in between size, 6s can be too snug and 8s too loose. I have this dress in 2 colours, one in a 6 and the other an 8 (it was the sales!) and because their sizing s spot on, the 6 is a snug fit and the 8 quite loose. A tip for you though....if there is a dress you like, try and get it from John Lewis ( or house of Fraser) rather than LK bennett themselves. Their service is crap and their returns policy mean.