30cm Wooden Ruler – Unpolished, Durable, Eco-Friendly Measuring Tool The 30cm Wooden Ruler (Unpolished) is a classic and reliable measuring tool designed for schools, offices, and everyday use. Crafted from sturdy natural wood, this ruler offers accurate measurements with clear markings for precision. Its unpolished finish gives it a simple, eco-friendly, and traditional look, making it a sustainable alternative to plastic rulers. Lightweight yet durable, this wooden ruler is perfect for students, teachers, engineers, architects, and craft enthusiasts who need a dependable tool for straight lines and accurate measurements.