Flamingo Urban 3/4 Sleeve Dress Gray Medium?

Flamingo Urban 3/4 sleeve dress. Top is gray and skirt part is gray, white and black plaid. This is pull-on style, with an elastic waist. There are no size or material tags, so please see measurements below. Material feels like a cotton blend. Dress was photographed on a size M mannequin. Item is in good pre-owned condition. Flat lay measurements: Underarm to underarm: 18” Shoulder to hem: 38”