Track SQL database table level size?

I believe that you could find some inspiration in this template: SQL Database Size

SQL query can be easily modified to watch just single selected table like this:

SELECT TOP 1
    SUM(CONVERT(BIGINT, a.total_pages)) * 8192 AS TableSize
FROM
    sys.indexes i
INNER JOIN
    sys.partitions p ON i.object_id = p.OBJECT_ID AND i.index_id = p.index_id
INNER JOIN 
    sys.allocation_units a ON p.partition_id = a.container_id
WHERE i.object_id = OBJECT_ID('dbo.YourTable')

Petr