Isabel de Pedro black zippered jacket with chiffon trim and striped sleeves 12

I’ve neither worn nor washed this. The care instructions are on the tags. The sleeves are light sweater like and have stripes. It’s the most interesting feature. Around where the front zipper is, up the front of the piece, is a light trim that feels and looks like chiffon to me. The sleeves are cut short on purpose but longer than 3/4. It’s warm and cozy for such a lightweight jacket. It’s a 12 but because it’s a jacket I expect a looser fit. The fit on this, when zipped, is snug/bodycon. When open it has a looser look.