This 30cm ruler is a versatile and essential tool for students, professionals, and hobbyists alike. Made from durable materials, it features clear, easy-to-read markings in both centimeters and millimeters for precise measurements. Its lightweight and slim design make it easy to carry in a backpack or pencil case, while the smooth edges ensure safe handling. Ideal for use in classrooms, offices, or at home, this ruler is perfect for drawing straight lines, measuring lengths, and assisting with various projects.