title: How do you find the disk size of a Postgres / PostgreSQL table and its indexes
body: <p>I'm coming to Postgres from Oracle and looking for a way to find the table and index size in terms of <code>bytes/MB/GB/etc</code>, or even better the size for all tables.  In Oracle I had a nasty long query that looked at user_lobs and user_segments to give back an answer.</p>
  
  <p>I assume in Postgres there's something I can use in the <code>information_schema</code> tables, but I'm not seeing where.</p>