Postgres DB Size Command

Question

What is the command to find the size of all the databases?

I am able to find the size of a specific database by using following command:

Answer 1

Start pgAdmin, connect to the server, click on the database name, and select the statistics tab. You will see the size of the database at the bottom of the list.

Then if you click on another database, it stays on the statistics tab so you can easily see many database sizes without much effort. If you open the table list, it shows all tables and their sizes.