Transparent sticky notes compared with traditional sticky notes, a clear sticky notes design can avoid blocking the original files, on the page adds annotations to books or mark important documents without staining the book, making learning easier. Due to translucent sticky notes being made of waterproof PET, in order to get a better user experience, please use ballpoint pens, pencils, or oil-based markers to write on transparent sticky notes. Gel and water-based pens are NOT recommended. 50 sheets per pad, 2.95" x 2.95".