Universal Standard Cai High Neck Tank Dress Size M (18/20)

Tried on once or twice but never actually worn outside. No tags. Universal Standard size M is a 18/20, but this dress seems to run a little small based on my experience and some reviews. From product listing: • 48" length • Runs Between Small And True: We suggest you size up if between sizes. • 93% pima cotton, 7% elastane Open to reasonable offers!