A limited edition have been created at the University of Nottingham, where I work with scientists to create Sixty Symbols and Deep Sky Videos (among other things).
Just over 30cm of geeky pleasure
Featuring a cm and a log scale
Professor Mike Merrifield with the prototype
From the planck scale to the size of the observable universe
The backside features physical constants
My favourite bit a sixtysymbols plug!!!
A health warning!
The rulers have been produced for fun but also to promote the University of Nottingham's excellent School of Physics & Astronomy.
At this stage the plan is to mail them to Year 12 students who have shown an interest in studying physics at Nottingham (via UCAS).
Some will also be handed out to be people visiting the university for open days.
I will try to get my hands on a few for sixtysymbols viewers, but no guarantees.
You could try following Professor Merrifield on Twitter too - maybe he will tell us more when the main batch arrives!?