I have to pare down my closet and I have a few of these so I'm offering this one.
The fabric is not thin enough to be sheer, but black underwear is going to be visible. Looks great on its own or layered with other things.
Approximate flat measurements:
Length: ~29" front, ~30" back
Armpit to armpit: ~16.5"
Sleeve length: ~24"
The only imperfection is that I first hung it on the wrong sized hanger so it stretched some of the fabric near the shoulder. Not a big problem since on an XS the shoulders should fall off a bit.
Asking $30 including shipping within the continental US. Listing ends in a week.
If there are any questions leave them in a comment with your e-mail address and I'll get back to you shortly.