Vintage Y2K Marciano Ribbed Black Bodycon Dress mini wide sleeves V neck US Sm

Vintage Y2K in great condition. Lightly ribbed, thick, stretcy and bodycon. The top of the sleeveves have a sligh ruching and the vneck/pit part of the sleeve is a bit low. Size not visible on tag, see measurements. The waist measures as a small which fits the chart. Could be a very snug medium imo, check measurements to confirm (the chest measurements are pit to pit, which is low, so the waist and lenght seem more accurate). On trend