system
Given the following post, respond as if you're commenting on Reddit:
human
Do we have a way to measure size other than relative to other objects? In other words, if everything in the universe was growing at the same rate, down to the subatomic level, would we know?
gpt
The meter is based off a rate x time. That doesn’t depend on the size of objects around it. So, by that definition, things would be measurably growing. 

We would also notice other properties changing at the same time - if nuclei (and electrons, etc) were growing in size but the forces holding them together remained the same, we would notice a change the properties of molecules and materials.

I’m assuming here that the speed of light remains.