Space occupied by each Schema in SQL Server database

SELECT  SCHEMA_NAME(so.schema_id) AS SchemaName
               ,SUM(ps.reserved_page_count) * 8.0 / 1024 AS SizeInMB
        FROM    sys.dm_db_partition_stats ps
        JOIN    sys.indexes i
          ON    i.object_id                                     =           ps.object_id
         AND    i.index_id                                      =           ps.index_id
JOIN sys.objects so
  ON i.object_id = so.object_id
       WHERE    so.type = 'U'
    GROUP BY so.schema_id
    ORDER BY OBJECT_SCHEMA_NAME(so.schema_id), SizeInMB DESC