Sachiko is one of my Etsy favourites; she designes and creates some of the most comfortable AND elegant garments I've seen. Not just that, but she uses only bamboo and organic cotton! Wearing these clothes will not irritate your skin, since they're smooth and lightweight - better than silk, if you ask me.
Most of the pieces are made to order and according to customer specs, so they'll come with the perfect fit.

Especially if you're a dancer, you might want to check out her shop. The prices are great and the quality of sewing is perfect.