The subject wants to ask "How big a suitcase is suitable for the dormitory of Jingdezhen Ceramic University"? 26 inches. The dormitory of Jingdezhen Ceramic University is a dormitory for four or six people, which has a large available space and can put down a 26-inch suitcase. The 26-inch suitcase is large enough to hold the necessities of life, which is more suitable for dormitory use.