This dress is a bit too big for my mannequin, which is a size medium/large.  The dress is strapless with a 17" zipper in the back, and a little bit of elastic at the neckline.  No darts in the bodice, not much structure.  The dress has a red lining, with lace burnout fabric over it, and the jacket is made of the lace burnout material.  The material has a satiny sheen to it, with embroidery and sequins and beads all over, and a burnout design.  The back of the dress has a slit.  The jacket is floor length, and it drags on the ground a bit.  The big open jacket has kimono-style sleeves, and the jacket fits me (size 16-18).  No tags at all exist in the dress, so the fabric content is unknown.  It appears to be handmade and made to fit measurements of 44" bust, 35" waist, and 42" hip.  Please see full measurements for fit.  Please feel free to ask me any questions.  The box weighs 6 pounds, so shipping will reflect that.  
Dress:
top to bottom:  42"
top with elastic:  34" stretching to 38"
bust:  44"  max
waist:  35"
hip:  42"
waist to hem:  30"
flare:  42" with a slit

Jacket:
shoulder to shoulder:  24"
armpit to armpit:  28"
sleeve:  25"
sleeve cuff:  28" around
shoulder to hem:  60"
flare:  86"