This is a size large, unaltered Kaia Birdy Grey maxi dress with adjustable spaghetti straps, 
faux wrap lined empire bodice that does not have padding, side stays or boning.
The skirt wraps in front and has two underlayers.  It zips in the back.
Although the website recommends dry cleaning, I was able to successfully machine wash 
the dress in a net bag on gentle cycle, and hang it to dry. It is in like-new condition.
The empire waist is slightly raised, and there is some elastic on the back waist seam for breathability.
For measurements, check the Birdy Grey website. 
Approximate flat measurements are: 
Pit to pit 18”, underbust 15.75” with some elastic,  length from underarm to hem is 52”
The hem sweep is huge!