How to see the size of the repository in the repositories listing view?

A screenshot of the /<username>?tab=repositories&q=&sort=size is as follows:

I am able to sort by the size, but at present I can see the size only when I go inside the repo.
Is there a way to add the size column so that it shows in the same view of the repository list?

OR is there another place that I can get this information (all sizes in one place!)?

The admin view will show this information. Some template patching might make it visible.

Are you in a position to point me in the right direction for this? Which template, where, would help me get it done soon. It is a really useful feature to have when managing space, numbers. I could only wish there was an admin checkbox to enable this! But for now, surely a little bit direction would do wonders!