Often I need to test something and use SQL database table of particular size for my test, and sometimes it is easier to pick up some table of appropriate size (at least in terms of rows number) from what you already have. This is the case when this SQL script may come in handy:
DROP TABLE #counts
CREATE TABLE #counts
EXEC sp_MSForEachTable @command1='INSERT #counts (table_name, row_count) SELECT ''?'', COUNT(*) FROM ?'
SELECT table_name, row_count FROM #counts ORDER BY row_count DESC