[Necrosmos] Size difference

SELECT * FROM gallery2 WHERE topic_id="1504757" UNION SELECT * FROM gallery2 WHERE topic_id="24972" UNION SELECT * FROM gallery2 WHERE topic_id="1626908" UNION SELECT * FROM gallery2 WHERE topic_id="83839" UNION SELECT * FROM gallery2 WHERE topic_id="547112" UNION SELECT * FROM gallery2 WHERE topic_id="718420" UNION SELECT * FROM gallery2 WHERE topic_id="668847" UNION SELECT * FROM gallery2 WHERE topic_id="70077" UNION SELECT * FROM gallery2 WHERE topic_id="1218048" UNION SELECT * FROM gallery2 WHERE topic_id="984045" UNION SELECT * FROM gallery2 WHERE topic_id="277684" UNION SELECT * FROM gallery2 WHERE topic_id="1678878" UNION SELECT * FROM gallery2 WHERE topic_id="1532537" UNION SELECT * FROM gallery2 WHERE topic_id="976362" UNION SELECT * FROM gallery2 WHERE topic_id="1045027" UNION SELECT * FROM gallery2 WHERE topic_id="551861"