S For Style Mock-neck mini bubble dress, in black, cotton/elastane, M, NWOT

This sleek and demure bubble dress, labeled S For Style, is a silhouette that I absolutely adore, which is why I bought it without triple checking the sizing. I know Euro sizing fits smaller, so I thought 3XL should be safe. But NO, this is quite tiny on me - maybe a women's size M? It's a fairly dense knit fabric with some give, but not that stretchy. The dress features long sleeves, a mock neck, and a beautifully fitted torso with sculptural draping from the central panels flaring at the hips. Thanks to my volunteer model, Kristin, for fitting into it perfectly (she wears between size 4 to 8, depending). The photos are the first and only time this dress was even tried on. Measurements taken flat: Shoulder 14" Bust 17" Waist 15" Sleeves 24.5" Length front - 33" back - 38" with draping, 45" straight measurement to back hem