Fendi navy zip up dress size 4

This cute FENDI dress is a navy blue color, 100% cotton, size 4 but it fits more like a 6-8 or medium. Color is most like 1st photo - navy blue. The cotton fabric is thicker and holds shape very well. It has cinching cuffs and zips from hem to the round neck. All pockets are functional and the 2 at the chest have the FF logo flaps. I’m a size 2-4 and this dress is too big on me. All measurements taken lying flat & are approximate: waist: 16.5, length: 35, hips: 23, chest (pit to pit): 20, shoulders: 20. I did wear this dress to work twice and used a belt; it’s in great condition. I purchased it new on Vestaire.