Straight Ruler 20cm Metric Clear Measuring Tool Checkered Design With Wavy Line Features: Size - Measuring Length: 15cm / 6"; Width: 30mm / 1.18"; Thickness: 2mm / 0.08"; Minimum Scale: 1mm. They can be placed in your pencil case, or on the desk to space. Material - The straight rulers are made of polystyrene plastic, , not easy to break for using a long time, a good measuring tool. Feature - Transparent color allows for a clear view of numbers and letters on the page. With the clear math ruler, you can measure an object easily. Applications - The measuring ruler does not make you draw straight lines on one side, and wavy lines on the other, can use them to measure, and draw geometric figures, etc., providing you with large convenience, suitable for a variety of applications in classrooms, offices, and homes, for artists, designers, architects, engineers and so on. Package Content - 1 x Straight Ruler Product Description: Straight Ruler 20cm Metric Clear Measuring Tool Checkered Design with Wavy Line Material: Plastic Color: as the picture shows, (Due to the difference between different monitors, the picture may have slight color difference. please make sure you do not mind before ordering, Thank you!) Material - The straight rulers are made of polystyrene plastic, , not easy to break for using a long time, a good measuring tool. Applications - The measuring ruler does not make you draw straight lines on one side, and wavy lines on the other, can use them to measure, and draw geometric figures, etc., providing you with large convenience, suitable for a variety of applications in classrooms, offices, and homes, for artists, designers, architects, engineers and so on. Size - Measuring Length: 15cm / 6"; Width: 30mm / 1.18"; Thickness: 2mm / 0.08"; Minimum Scale: 1mm. They can be placed in your pencil case, or on the desk to space. Feature - Transparent color allows for a clear view of numbers and letters on the page. With the clear math ruler, you can measure an object easily. Package Content - 1 x Straight Ruler