Betsey Johnson Pirate Chest skull and crossbones opening ring

Super cool piece of jewelry! Used, vintage, but in good condition! The lid of the chest opens to reveal “treasure”. Unsure what ring size it actually is, but the diameter measures about 3/4 of 1 inch. Please see image with measuring tape. Fits snugly on my ring finger, and I am a size 7. Fits pretty well on my pinkie finger (smaller). Please purchase at your own risk knowing that it is not an exact size. Apparently this ring is rather rare.