I got the Topshop wrap back blouse and the Caslon knit blazer today, and I think they are both keepers. :). Took a couple of quick, unstyled shots in case anyone was considering these items.

Topshop blouse: I'm quite impressed with this, given the price. The fabric is a nice silky, textured woven viscose in a pretty pearl grey. It's much more substantial than I had imagined and feels quite nice. The wrap back is a fun detail (and looks better when I'm not contorted to try to get a photo!) and a nice side effect of it is that I don't get hip pulling like with most button downs. I sized up, but I find that top shop usually runs small anyway.

Caslon knit blazer: this feels like a sweatshirt. I could sleep in it, it's that comfy. It's definitely on the casual side but that's what I wanted. I think it's ever so slightly too big but that adds to the cozy factor and a size down would be too tight in the arms. It's cut to give a little bit of hourglass shape. I got my normal size medium.