Source Identification Code regulation Article 7
Each alphabet or numeral contained in an SID Code shall be 0.5mm to 1mm in height.
中文原文 來源識別碼管理辦法第7條
來源識別碼每個字母或號碼之高度為零點五毫米至一毫米間。
English translation for reference only; the Chinese text prevails. Not legal advice.