You can't see scale in this photo, but it's about the same size as my Yashica Clip-on, Fris and Capital. It has a foot underneath so it can be seated on the accessory shoe of a camera, so it's small.

This Super is a later version of their earlier YEM 35.

This would be a nice unit to use on my various meter-less cameras, but it suffers from the same problem of almost all CdS meters built in the 1960s: it uses the infamous PX625 mercury battey which can't be found anymore. So you can either try to find a voltage-equivalent and make an adapter for it, or buy the special converter, or have it recalibrated for a modern battery, all of which far exceed the value of the meter itself.