[Necrosmos] Size difference

SELECT * FROM gallery2 WHERE topic_id="1815712" UNION SELECT * FROM gallery2 WHERE topic_id="719082" UNION SELECT * FROM gallery2 WHERE topic_id="107090" UNION SELECT * FROM gallery2 WHERE topic_id="1650306" UNION SELECT * FROM gallery2 WHERE topic_id="846419" UNION SELECT * FROM gallery2 WHERE topic_id="937702" UNION SELECT * FROM gallery2 WHERE topic_id="1309931" UNION SELECT * FROM gallery2 WHERE topic_id="898017" UNION SELECT * FROM gallery2 WHERE topic_id="1560281" UNION SELECT * FROM gallery2 WHERE topic_id="864273" UNION SELECT * FROM gallery2 WHERE topic_id="954484" UNION SELECT * FROM gallery2 WHERE topic_id="810647" UNION SELECT * FROM gallery2 WHERE topic_id="124048" UNION SELECT * FROM gallery2 WHERE topic_id="152941" UNION SELECT * FROM gallery2 WHERE topic_id="1268225" UNION SELECT * FROM gallery2 WHERE topic_id="187804"