The smallest locket I’ve had, and so sweet! Lovely engine turned detail front and back, good working hinge, and it opens to house 2 photographs or a little keepsake (a cut of your lover’s hair, perhaps?). I’ve attached a short chain so that when it’s attached with other charms it will sit below them, but it also looks fab this way on its own. 
Measurements:
• 12mm diameter 
• chain drop 3cm