So here in progress, is my wearable muslin of the blouse, waiting to be stitched up and maybe even worn over the Burda black cotton "sharkfin" skirt which has a very high waist.
Yes, I know I still have to sew this thing up,
TIPS: I'm glad I'm doing a muslin of this on IKEA cotton and not on an expensive silk. As simple as this design is, there are already a few hiccoughs I'm encountering. One is that I wasn't clear on whether the whole hem of the shirt, front side as well as bottom was supposed to be 4 cm so I used a 1.5 cm seam surplus on the slanted side and a 4 cm on the bottoms of all sides. As it turns out I need the 4cm to give me just a 1.5 hem turned in .5 and then again 1 cm. That way I've got a finished look, but a longer shirt. I suspect I was supposed to do 4 cm all the way around. (My French isn't perfect and I'm using the French edition of Burda.)
Second, make sure you don't catch the overlapped front into your shoulder seam at the side, but only at the top.
Third, the instructions tell you to do a mitred corner on both the front hanging angles. Watch OUT. If you do a standard mitred corner you're assuming a 90 degree angled corner and this has an oblique corner that you should baste and adjust so it lies flat once it's sewn and trimmed. Otherwise it pulls too tightly on the shirt hem.
UPDATE; Finished this in record time, so the rating in Burda is on the nose. All it needs is a press, because I test-washed the corner to see if it was colorfast. Notice how I color-matched the red stripe running off the shoulder and down the arm?