1980s Banana Republic denim miniskirt 100% cotton with back closure, fits like 4

Vintage 1980s Banana Republic blue denim miniskirt with back closure and slit. It’s 100% cotton and machine washable. The slit has been altered to be a little higher than it originally was to allow more leg movement (see closeup). The skirt is in otherwise very good vintage condition. It’s labeled size 10 but fits more like a modern size 4 (see below). Approximate measurements lying flat: Waist: 13” Hips: 17.5” Length: 19.5”