I currently have three Sage blouses, one is the black and white gingham, one is the original white one, and one is a white one I've dyed red. This review is for the white Sage blouse and it is fantastic. It is lightweight, soft, airy and lovely. It goes with everything! And I truly mean that, it goes with EVERYTHING! It looks fantastic with skirts, trousers, jeans, under dresses... I just love it! I will say one negative thing about the white one though, and that is that it is rather see through. Size wise it is quite true to size in my opinion. I'm usually a high street size UK16, and I got the UK16. It looks good, I think, but there's a bit too much fabric around the waist area. The chest area is perfect though, and there's no gaping at the buttons.
As I mentioned I also dyed one of these white ones a deep red, and it dyes beautifully. It is (obviously) less see through when dyed red. And because I used a method for dyeing that required hot water it also shrunk a bit. Which ended up being very lucky, because as it shrank the size became just right. If you're between sizes I would say size down unless you are really busty. Clearly I love this blouse a lot being that I have it in three colourways. I adore it!