I think I got the wrong size.

SELECT * FROM gallery2 WHERE topic_id="50293" UNION SELECT * FROM gallery2 WHERE topic_id="375896" UNION SELECT * FROM gallery2 WHERE topic_id="1488870" UNION SELECT * FROM gallery2 WHERE topic_id="877207" UNION SELECT * FROM gallery2 WHERE topic_id="691753" UNION SELECT * FROM gallery2 WHERE topic_id="1223901" UNION SELECT * FROM gallery2 WHERE topic_id="1750743" UNION SELECT * FROM gallery2 WHERE topic_id="622249" UNION SELECT * FROM gallery2 WHERE topic_id="1479300" UNION SELECT * FROM gallery2 WHERE topic_id="1682400" UNION SELECT * FROM gallery2 WHERE topic_id="1309372" UNION SELECT * FROM gallery2 WHERE topic_id="1167643" UNION SELECT * FROM gallery2 WHERE topic_id="1760738" UNION SELECT * FROM gallery2 WHERE topic_id="1559849" UNION SELECT * FROM gallery2 WHERE topic_id="653265" UNION SELECT * FROM gallery2 WHERE topic_id="1699126"