Reminiscent of Lost in Space on the telly.
(Please don't tell me if you don't remember it!)
Robot
Dimensions (LxWxH): 16mm x 24mm x 7mm (approx.)
Weight per cufflink: approx. 8g (light)
Space Blaster
Dimensions (LxWxH): 19mm x 13mm x 5mm (approx.)
Weight per cufflink: approx. 6g (light)