Now, I'm not much of a girly-girl. I hate shopping for clothes with a passion, especially in the last couple of years, since I put on -- it hurts to type this -- 50 lbs. But I found this tunic and... I. Love. It.
It's the Summer Goddess tunic from World Market. They cost $19.99 and a L/XL quite comfortably and loosely fits an American size 14/16. It may even work for a woman who wears an 18.
This is the lightest, airiest, most comfortable shirt I've ever worn. If you don't mind the 3/4 sleeves, it works quite well with hijab and jeans. The fabric is surprisingly thin, but it's also opaque -- no showing more than you want to show. : )
I have two -- one has a blue and green floral motif, the other is blue/light purple -- or pink, I can't decide -- and white. They're both gorgeous. Sorry I couldn't find photos online... I'll post them when I can.
Best of all? When it gets worn out I'm going to rip out the seams and use it as a pattern to make my own tunics. The only difference is that I'll make the sleeves a little longer.