Unfortunately, I'm unable to edit my original review (below) so I'm writing a second one relating to the smaller size. The size medium I've worn on several occasions and after a few hours it does tend to go a bit baggier. So, I thought I'd try the small, if it didn't fit then I'd just give it to a friend.
Just taken receipt of the small now in a different colour and despite my concerns of it not fitting across my bust, it does fit, even with printed text. Yes, it's a snugger fit, but not the to point where it's stretched. There doesn't appear to be a massive difference between the two sizes and to be honest, I can get away with either size. Once again though, the tshirt is great quality and I'm already looking at another logo for another colour!
Emma C. from Knutsford