I think it's easy to use for both formal and private occasions. The size is marked as 38, but I believe it corresponds to a size M. The length is around knee-length or slightly above the knee. The lace detail on the sleeves is cute and stylish. It has a solid lining, so it's not see-through. I think it can be used not only in autumn and winter but also in spring. I don't see any stains, but please purchase with the understanding that it is a used item. Pattern: Solid Size: M