This Evil Queen costume is a slightly sexier look, but similar to the famous Disney "Snow White" Evil Queen. 
This costume is by Leg Avenue.

It's a long purple, zippered back, polyester dress, with a full length black attached cape, and a white stand-up collar. 
Zig zag, gold ribbon lacing in front.

Comes with a gold lame', foam based jeweled crown.

Sizes measure as follows:

                  Bust          Waist        Hip
S/M-         32"-34"       26"-28"   32"-34"
M/L-         34"-36"       28"-30"   34"-36"
XL-           38"-40"      32"-34"    36"-40"

Nice quality, attractive costume.