how do Cos sizes come up?

[lowra]

I'm a fairly large size 10 and wondering whether to order a dress in a size small or medium. Any ideas?

I find medium a good fit and I'm a 12. So perhaps a small would be best, though it depends on the style as some of their relaxed fit stuff I would also buy a small.

Hmm thanks tweet although I'm still not sure what to go for. I like a more relaxed fit. Perhaps I'll try to get into store.