Package Includes: You will receive totally 12 pieces plastic bookmark rulers in 2 different sizes which can be used as A5 A6 size 6-hole binder notebook bookmark help you easily find the page you mark also can be used as a measuring tool to help you measure quickly. Size Reference: Each of our rulers has a clear scale on it and can also be used as a measuring ruler. The black ruler has 12cm 15cm and 20cm scales the transparent ruler has 12cm scales and the heart ruler has 15cm and 20cm scales. Please refer to the picture for the exact size of each ruler. Quality Material: The bookmark ruler is made of high-quality plastic material sturdy and durable light weight and practical with smooth edges and clear accurate scales for easy measurement which can be applied for a long time. Easy to Use: Our plastic bookmark rulers comes with 6 holes punched for inserting A5/A6 Size 6 ring binders and notebooks. And the set includes both that double scale ruler and single scale ruler to meet your different needs. Please check whether the hole spacing of the ruler is suitable for your notebook snaps before buying. Multifunctional Tools: The ruler is multi-functional It is not only a ruler measuring with metric and imperial measurements but also a pagemarker and page finder to keep track of where you left off perfect tool and supplies for business office classroom library and everyday use. It's great for writing drawing sketching journaling note-taking and more.