bihun vs soun

My (Polish) best friend Iza and I had a blast conversation today. One of the topics we discuss was white, transparent noodle we (Indonesian) call as “soun”. Also “bihun”. And, oh, “vermicelli”. Okay, what are those. I said to her, to be honest, I had no idea what’s the different between soun, bihun, and vermicelli…