This is a formal skirt. The size is indicated as 9AR. I purchased it at a store and wore it only once. It's clean with no noticeable stains☆ The length is about knee-covering for a person who is 159cm tall. It has a lining and is not see-through. It's black and simple, so I think it can be used for any occasion, including formal events! ※The jacket in the first image is listed separately. Due to the thickness, I will fold it up small for shipping. Please feel free to comment if you have any questions (*^*)