For my first "muslin" I used some stuff I've had in my stash for ages, collected during sales, not for any particular purpose but I think my color choice was inspired by the lovely blouse made by Meg at Cookin' & Craftin'. The dark yoke and placket on a lighter fabric looks great to me!
This is size 12 shoulders, graded to 16 at the hips. Instead of buttons, I sewed down the placket a little higher than the design, as is required to cover my bust. I did not do a FBA and the result is that when worn, the gathers are fully engaged as coverage. This looks fine to me! If you want the gathers to show as decorative gathers, an FBA will be necessary.
I have only one complaint about the pattern... The instructions say to sew on one placket to the blouse first, then attach the lining piece to the first placket, then sew them both down. This was a horrible disaster for me. I had to unpick the whole thing and start over with new cut pieces. I sewed those together first, turned them right side out, pressed them and then attached them together to the blouse. The results are less than perfect, but better than a horrible disaster. I'll be even more careful with my next shirt.
My third attempt is with two jersey knits of similar weight. Sigh. Why didn't I start this way?
The main body is a lovely stretchy Liberty of London viscose print that I stalked on fabric.com until the price went down sometime last year. I ordered a lot of it, enough to make this Camas shirt out of the leftovers from making an unblogged Moneta a few months ago. The black fabric is a nice quality black rayon jersey from Harts. The fabrics have matching weights which made everything go together smoothly... although I had lots of practice by this point too.
I put buttons on the plackets, sewing them together with each one instead of stitching the length. No buttonholes for me, thank you.
The shirt is a little boxy for my figure, but it's easy enough to wear with a belt, or not. :)