H&M black lace corset

Black lace corset from H&M. Light boned. Tag says 12, but fits smaller IMO. I wear a 10/12, 38DD and it fits loosely around my stomach but is too small around the bust/upper torso. I’d say it would probably fit a C cup best. Has attachments for stocking clips, but I can only find 3 of them. Only worn to try on.