S Louche Pineapple Fruit Retro Navy Skirt Pockets

S Louche Twee Pineapple Navy Skirt Pockets Pineapple skirt with pockets! Zip up back, 100% Viscose fabric shell and lining, measurements included in pics. Used but no visible wear. It says size 6 but it fits my friend who is a size 4, so I’m wondering if it shrank, and I put size small either way, see pics for measurements. 20 or YBO! Thanks for looking, lmk if you have any questions!