COS Navy Ruffle Frill Detail Shift Dress Size Small?

COS Navy Ruffle Frill Detail Shift Dress Size Small? No internal size tag, not listed on care tag. Please reference approximate measurements in photos. Excellent used condition! One small white line mark near bottom hem. See last photo. Dress is Machine washable, so may come out with wash. Hardly noticeable. Frill detail on sleeves Rounded boatneck Knee length Shift silhouette Medium weight fabric Shell: 66% Rayon, 30% Rayon, 4% Spandex Machine wash cold gentle cycle recommended