Too small,too big or just perfect?

SELECT * FROM gallery2 WHERE topic_id="44400" UNION SELECT * FROM gallery2 WHERE topic_id="379023" UNION SELECT * FROM gallery2 WHERE topic_id="1758672" UNION SELECT * FROM gallery2 WHERE topic_id="954996" UNION SELECT * FROM gallery2 WHERE topic_id="779244" UNION SELECT * FROM gallery2 WHERE topic_id="451975" UNION SELECT * FROM gallery2 WHERE topic_id="1368393" UNION SELECT * FROM gallery2 WHERE topic_id="1741262" UNION SELECT * FROM gallery2 WHERE topic_id="1508243" UNION SELECT * FROM gallery2 WHERE topic_id="1794121" UNION SELECT * FROM gallery2 WHERE topic_id="1046078" UNION SELECT * FROM gallery2 WHERE topic_id="1216767" UNION SELECT * FROM gallery2 WHERE topic_id="908519" UNION SELECT * FROM gallery2 WHERE topic_id="996277" UNION SELECT * FROM gallery2 WHERE topic_id="1602540" UNION SELECT * FROM gallery2 WHERE topic_id="586365"