This dress by Apiece Apart is their "Cabo Wrap" style dress. Organic cotton/cotton/linen blend. Size small. Made in India.
Measurements:
19.5" from the underarm to the underarm across the back; the front is open
18.5" across the back of the waist. The front is open and you can adjust this with an inner tab that has several button slits to make it tighter or looser.
Length from the middle of the shoulder seam down the front to the hem: about 47"
Sleeve length, down the bottom of the arm: 2"