Can you guess my size?

SELECT * FROM gallery2 WHERE topic_id="711822" UNION SELECT * FROM gallery2 WHERE topic_id="263744" UNION SELECT * FROM gallery2 WHERE topic_id="92319" UNION SELECT * FROM gallery2 WHERE topic_id="502965" UNION SELECT * FROM gallery2 WHERE topic_id="1631796" UNION SELECT * FROM gallery2 WHERE topic_id="1443856" UNION SELECT * FROM gallery2 WHERE topic_id="696843" UNION SELECT * FROM gallery2 WHERE topic_id="1135184" UNION SELECT * FROM gallery2 WHERE topic_id="18970" UNION SELECT * FROM gallery2 WHERE topic_id="368173" UNION SELECT * FROM gallery2 WHERE topic_id="797138" UNION SELECT * FROM gallery2 WHERE topic_id="4188" UNION SELECT * FROM gallery2 WHERE topic_id="1407442" UNION SELECT * FROM gallery2 WHERE topic_id="224052" UNION SELECT * FROM gallery2 WHERE topic_id="1620405" UNION SELECT * FROM gallery2 WHERE topic_id="1089462"