Price is for either one large metal heart hook or 2pcs. of the small heart, choose color and size. Large sizes are approximately 25x20mm, and the small size is approximately 20x17mm with each size weighing approximately .1oz. per piece.  To use them, just peel of the adhesive on the back, and stick to whatever surface you like!  These are commonly used  on the back of phone cases to attach phone charms to.