Postgres get table sizes

table_sizes.sql

SELECT
  relname AS "relation",
  pg_size_pretty(pg_relation_size(C.oid)) AS "size",
  pg_size_pretty(pg_total_relation_size(C.oid)) AS "size_with_indexes"
FROM
  pg_class C
  LEFT JOIN pg_namespace N ON (N.oid = C.relnamespace)
WHERE
  nspname NOT IN ('pg_catalog', 'information_schema')
  AND C.relkind <> 'i'
  AND nspname !~ '^pg_toast'
ORDER BY
  pg_total_relation_size(C.oid) DESC;