In Mb
SELECT
TABLE_SCHEMA AS `Database`,
TABLE_NAME AS `Table`,
ROUND((DATA_LENGTH + INDEX_LENGTH) / 1024 / 1024) AS `Size (MB)`
FROM
information_schema.TABLES
ORDER BY
(DATA_LENGTH + INDEX_LENGTH)
DESC;
In Kb
SELECT
TABLE_SCHEMA AS `Database`,
TABLE_NAME AS `Table`,
ROUND((DATA_LENGTH + INDEX_LENGTH) / 1024) AS `Size (MB)`
FROM
information_schema.TABLES
ORDER BY
(DATA_LENGTH + INDEX_LENGTH)
DESC;