I just can't stop, won't stop with matching sets lately! I just love them! I stumbled across this one when I was returning something to Nordstrom (figures) and just had to try it on. I was obsessed with it the moment I put it on my body and had to get it because it's on sale for 40% off.
For sizing recommendation, I'd stick with your normal size in the top and size down in the skirt. I found the skirt to run really large. Also keep in mind you can style this to show your stomach a little as well, I just prefer to not show that off ;)
This will be a great piece to easily transition into fall with the dark hues! Just add a pair of booties and a great hat once the cooler weather rolls around.