Features: Made of transparentplastic,easy to see through to underlines notes,convenient for you to draw columnsor check the layout of your paperwork! Ruler is transparentacrylic for easy drawing and viewing. All of the most common card sizes are marked for easy reference! Our ruler is clear and easy to read. The number and letters arecrystal clear. Double side measuring ruler cm and inch,portable and convenient. Zerocentering on the bottom and standard 6 inch measurements along the top mean no more countingtick marks. Ruler for drawing, measuring, use in daily life and convenient, is a good tool to have in school, office, home, etc. It is also a great forauseful measuring tool for artists, designers, architects, engineers, students teachers, students, and drawing enthusiastsa good useful measuring tool. Specifications: Material: Acrylic Size:Approx.12.07x19.3x2.86cm/4.75x7.6x1.125inch Color:White Package Includes: 1x T-Square Ruler note: ①.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. ②.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.