Product Description Unique Design: With its unique and sturdy elastic band design, you can easily attach the pencil case to the hard cover of your notebook or planner. This makes it easy and quick to find what you need when traveling or needing writing tools. Spacious Space: The pencil case has a zipper pocket that can hold 3-4 pens depending on the thickness of the pens. It perfectly meets your daily writing needs. Integrated Storage Space: The pen holder can be used not only to store pens, but also small items, such as headphones, data cables, SIM cards, USB sticks, etc. Easy to access, no more clutter. Premium Quality: Made of PU leather and elastic band, very light yet strong and durable. Perfect for the first day of school, school supplies, office workers, security guards, teachers, students, factory workers, employees and many more. Note: Only suitable for hard-cover notebooks or planners longer than 21 cm and writing tools shorter than 16 cm. Not only vertical placement, but also horizontal placement is possible!