Reminds me of the 60's. Or at least, what I remember of it!
Please be careful what you type should you wish to ask us about these cufflinks. Some filters will reject the mis-spelling.
Dimensions (LxWxH): 18mm x 18mm x 4mm (approx.)
Weight per cufflink: approx. 10g (average)
Size = x mm (W x H)