This is a size medium. It will fit a 34-36" bust and a 28-30" waist. 

This dress does have a stretch to it it. It is very comfortable! It is a two piece set. It includes the black satin corset as a base and has a black cotton with lots of black gauge cut up and stitched to the corset. The corset has eye hooks up the front and lace up back. The corset will give up to a 2 inch waist reduction. The skirting is so fabulous! Constructed with the same cotton and gauze and has plenty of stretch! The Dress is meant to flare out above the knee. This way you can walk properly. 
This dress can be worn as a vampire,zombie or witch and is great for the alternative bride or Prom!