This is a collector's piece...very beautiful and rare.
Made from denim, it's padded for warmth (like a duvet coat) and fully lined.
While the sleeves are obviously voluminous, the body is relatively fitted... would be a good fit from a UK8 - UK12.
Sits mid thigh in length (based on a height of 5'7").
Given its volume, I'd say it is a better fit for a taller woman... from around 5'5" and up.... I think it might swamp you otherwise.
In amazing condition.