I ordered two tops medium size, based on previous reviews which seemed to suggest that the sizes were quite small. I have found that medium is actually quite big - but very easy to wear I like the pockets as well. The only gripe that I have is that somehow even though the shoulder straps are well fitting as the material falls to the chest my boobs look enormous , it must be something to do with the cut of the fabric. Whilst I don't particularly like the big boob look - in my case comfort wins!!