Package Includes: 12inch/30cm or 24inch/60cm wooden ruler. Double sided scale measuring drafting ruler. Wooden measuring ruler with double sided measuring features delineated numerals and graduations. Made from good wood , very and not easy to bend, with smooth surfaces, easy to use. The scale of the ruler is very clear and accurate, will be helpful you in measuring your items accurately and architectural drawing. A must have measuring tool for students, teachers, artists, designers, architects, engineers, construction and more. to have it in classroom, school, office, .