There is no size on the label.
Based on the measurements I think it is a size 10.
Photographed on a size 10 mannequin.

Measurements are in the photos.
Please ask if you need more information.

I think the material is a Viscose/Elastane mix.
Hand wash.

The material is stretchy.
No fastening.

Excellent used condition. 
No specific signs of wear to comment on.

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