I bought an XXL based on size chart, I normally wear an XL or 16 dress, XL or 16 pants. I'm sort of flat chested considering my size, 40B, and while most of the dress is comfortably loose the top pokes out and gaps funny.  I've had it on all day though, it's very comfy. The fabric feels great against skin. I wore it with a crinoline today but might not every time.

It came in a bag and was pretty wrinkly. I hung it up in the front of my closet for almost 2 weeks, hung it in the bathroom to steam it and ironed and it was still wrinkled.