I bought this a few years ago at a select shop, either Tomorrowland or Baycrews, for around 20,000 yen. It's knee-length and has an elegant silhouette, so I wore it once to a friend's wedding. The fabric is sturdy, so I think it can be worn casually, not just for parties. Wrinkles can be easily removed with an iron. I couldn't find a size tag, but it feels like a size L.