Old fashioned style Camera Cufflinks, in the style of a folding camera. These do not fold - the front part is solid. And, just to be clear, they don't take photos either.
Plated and enamel cufflinks.
Dimensions (LxWxH): 17mm x 15mm x 15mm (approx.)
Weight per cufflink: approx. 10g (average)
Size = x mm (W x H)