FLAT MEASUREMENTS:
XS-M
Across chest (Armpit to armpit) : 21.5" (43" all the way around)
Length shoulder to bottom 36.5"
L-XL
Across chest (armpit to armpit) : 23.5" (47" all the way around)
Length shoulder to bottom: 36.5"
XXL
Across chest (armpit to armpit): 27" (52" all the way around)
Length shoulder to bottom: 37"
For reference, Soraya is wearing the XXL . Her measurements are 40" bust, 37" waist, and 58" hips. She usually wears 1-2X for tops and 3X for bottoms. (The dress has lots of room in the hip area)