Like the first shirt, I bought a yard of stretchy nylon fabric, right next to all the swim and dancewear fabrics. This time I bought white, understanding fully that I'd forever need to wear a tank top underneath it because the fabric was pretty sheer.
And, like the first shirt, I folded it in half the long way/vertically, so that I'd have half a yard hanging from my shoulders. I did this because I'm 5'10" and all torso, so I need my shirts very long. For for normally-height-and-proportioned people, you could try folding it horizontally instead. This would probably give you much flowey-er sleeves.
Did I mention yet that I'm all torso and this shirt is long?