Vintage 80's Hollywood Era Acidwash Denim Pencil Skirt Size 4/6 Midi Canada made

Vintage 80's Hollywood Era Acidwash Denim Pencil Skirt Size 4/6? Midi The label says 31 but the waist is not a 31. It's 13" across laid flat, 18" at hop plaid flat. There is ZERO stretch. My best guess is a size 4/6. Great shape, such a cool piece. Measurements in pics. Made in Canada