The "dress" is chiffony. Guessing it would come to knee length/shorter. I actually thought it was a tunic when I saw it. But the undervest thing is full length.
Anyway a size 8 could probably get away with it as a dress. Me with my huge bum won't. As soon as I bend over I will expose my bum.
Can I wear it as a tunic over wide trousers? Is that not the fashion now?