Evereve NWT Sunday in Brooklyn Ella Fliral Dress Sz S (fits like a M)

New With Tags Evereve Sunday in Brooklyn Ella Floral Maxi Dress Sz S, but fits like a medium (note- for some reason store tag says XS but garment tag says S) Measurements laying flat: Armpit to armpit approx 18 inches across Waist (elastic unstretched) 13 inches across - 16 inches+ stretched Length from center approx 55 inches Smoke free home