There's no automatic method to do that with absolute precision. But, in case you'd find it useful to scale everything down by 75% (which is close to what you're looking for IMHO), you can try to download the latest AIDA64 beta update:
https://www.aida64.com/downloads/latesta64xebeta
On the SensorPanel right-click --> Scale --> Scale all items down by 75%. Make sure to backup your SensorPanel layout before trying that out.