15 inch. The small suona with 7-inch pole is popular in Guangdong, Guangxi, Fujian, Hunan and other places, and its timbre is soft. Can be competent for solo or ensemble, can be competent for singing and dancing or rap. The commonly used 1 1 inch suona is popular in Jiangsu, Zhejiang and Anhui, and the volume is relatively soft, which is mostly used for song and dance accompaniment; 15 inch suona is popular in the northeast and eastern Hebei, and is mostly used to play large-scale music, which is sad and beautiful.