Love the game!

It would be cool and a simple change to display this:

When you examine a planet, in the Structures tab, it would be cool to show the Size next to each structure you've built, to more easily figure out how to manage the space.

I know you can just click on the "Build New Structure" button to see size costs. But it would be more user-friendly to show it right next to the stuff you've already built so you know what can be torn down. Plus, I'm thinking of artifact structures too.