This is a beautiful light weight dress. Since it's a blouse material there is no stretch. If you are in-between sizes i would size up!! This is labeled a Jr cut.

Ruffle Floral Dress Sleeve Length: Sleeveless Dresses Length: Short

Lighting changed the coloring a bit. 

Size

S- 0/2

M- 4/6

L- 8/10

XL- 12/14

If you want a looser fit you can size up. I'm wearing a large.