COS twin set, NWOT

This is a gorgeous tank and cardigan set I bought online, and it is just too big on me. It is sized as Medium but should really be Large - please see measurements. It has a slouchy, loose fit, but felt too roomy on me. Never worn - I had cut out the content tags so couldn't return it. The fabric has a great stiffness, and is quite sheer, so ideally the two pieces should be worn together. The color is a copper ombre. It is 100% polyester. It is delicate, and according to the COS site care instructions: - Dry clean - Only non-chlorine bleach when needed - Line dry - Low iron - Machine wash cold - gentle cycle Original prices were $89 (tank) and $135 (cardigan)