I know that they're supposed to be Smart Phones, but really these ones are so non-specific that I had to call them something different. I don't mean to hint that they're not smart, though. I am sure they are as intelligent as every other pair of cufflinks. Or at least most of them - the Pi Cufflinks are real smart alecs!
Dimensions (LxWxH): 13mm x 20mm x 4mm (approx.)
Weight per cufflink: approx. 8g (average)