This Vivienne Westwood cropped sweater is from the Red Label line. You can wear it off-shoulder but also well suited for covering the shoulders. The bust has a cross-over design and the sleeves have a pointy elbow design.
Brand: Vivienne Westwood (Red Label)
Size: M (model has a size S)
Condition: 4/5 (see pictures for marks)
Measurements (fabric is stretchy and asymmetrical):