A SIM C (Surat Izin Mengemudi C) is a driving license for motorcycles in Indonesia. While the exact format of a 2025 SIM C number might not be precisely defined due to potential regulatory changes, it typically consists of alphanumeric characters indicating the issuing authority, date of issue, and a unique identifier. Any concrete example will be speculative until the actual regulations for 2025 are released by the Indonesian authorities.