Anthropologie Akemi & Kin Women's Size XS/S Embroider Black Floral Top.   Elastic hem, machine washable gentle.  This blouse is very loose fitting and I feel could also fit a person who is a size M, please look at the measurements.

97% Rayon
3% Spandex

Flat measurements:
Armpit to Armpit~ 34"
Length from shoulder to hem~ 23"