Last night I just wanted to sew something quick so I pulled out Simplicity 2865, a Built by Wendy pattern, and a lovely Australian made cotton lycra knit.
I cut out view C in a size 12, left off the front placket (just an oblong sewed on, not a true placket) and the side inserts. I didn't even need extra length! I checked Pattern Review and a few people mentioned that they sized down because the pattern runs big. I think that's true when you use the side inserts, they add extra room around your middle, but because I left them off I had to use quarter inch side seams so that it wouldn't be too tight. Lesson learned? Think, don't just assume!
I really like this top and will get so much wear out of it - I can see myself making this up a few different ways so you might be seeing it again soon. And Mum, if you're reading, that's your birthday present blooming behind me in the top photo.