Effective studying depends on choosing the right tools. Kokuyo’s binder notebooks have become a favorite for learners with different study habits because they offer more than just note-taking - they also help you customize your notes and keep your documents neatly organized. With a wide range of sizes, you can pick the best one to match your study habits and goals.
Here’s an overview of each size and how they can be used, including feedback from actual users. Find the size that fits your style best!
A4 for Organizing
A4
The A4 binder notebook fits the most common document size. It has the advantage of being able to store lecture handouts and reference materials as they are, making it especially suitable for university studies and exam prep. It’s also perfect if you print your own materials or reports, so managing your study documents - whether in class or on your own - is a breeze.
Thanks to its wide-open design, you get plenty of space for writing or drawing, which is great if you like to use visual tools like mind maps.
Despite the A4-size, it can also store B5-sized loose-leaf notes, so you can skillfully manage both class material and personal notes effortlessly. For example, you can insert your class printouts and take lecture notes next to them. You can even add extra info from self-study or insights from group discussions wherever they fit best. This helps you keep all your related materials organized in one place, making your study process smooth and efficient.
As information accumulates like this, what emerges is more than just a collection of notes or materials. Knowledge gained in class and discoveries during self-study organically connect, creating your very own "customized textbook."
For those whose learning style involves not only notes but also using it as a print file, the A4 size is perfect.
User Voice
"I use Kokuyo’s Binder Notebook for my study notes. I also slip in printed materials in clear sleeves. Since most university documents are A4, it’s easy to store everything."
"Kokuyo’s binders aren’t heavy, and I want to carry all my study materials with me. I like that I can keep my summary notes and other notebooks together. If I can’t carry everything at once, it gets frustrating. So I rely on the Binder Notebook for convenience."
Binder Notebook
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Loose Leaf Paper
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B5 for Compact Note-taking
B5 Size
B5 is a compact, well-balanced size that’s popular for university notes because it’s easy to carry and comfortable to write in.
Just a bit smaller than A4, it's also thin enough not to bulk up your bag, so it’s great for everyday use. Even though it’s compact, you still get plenty of space to write. Wherever you are - class, café or library - B5 lets you study comfortably.
Have you ever found those tiny desks in lecture halls too cramped? Printed materials are usually A4 size, and textbooks are thick and take up space. If you want to take notes comfortably even in tight spaces, B5 fits just right.
It’s also makes it easy to compare your notes with textbooks or other materials without overcrowding your desk, so studying alongside books or devices feels natural and stress-free.
B5 is great not just for writing but also for reviewing and organizing your notes visually. For instance, you might summarize lecture points on the left page and jot down your own thoughts or questions on the right. By adding or removing pages freely, you keep only what’s important to you, making your study more efficient and tailored to your style.
This size is highly recommended if you want a smart, compact way to take notes.
For students who study regularly or working adults balancing jobs and learning, the B5 binder notebook is a perfect everyday study companion.
User Voice
"When attending university lectures, the desk is small, and A4 is too big. So B5 size is just right. A slightly smaller notebook than usual is perfect.
If you put only loose-leaf paper on the desk, it becomes perfectly flat, making it easy to write. This is something you can’t do with ordinary notebooks. If the notebook is thick, your arm gets in the way and it is hard to write, and your arm gets tired. Also, being able to organize your loose-leaf notes yourself is a big plus."
"I like B5 size because it is compact. It’s easy to carry because it’s not big. US binder notebooks are big, so they are a little hard to carry. Also, it’s not just smaller in size but thin, so it’s easy to carry. Even if I carry a laptop with it, it’s light."
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Loose Leaf Paper
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Smaller size for any purposes
Smaller Sizes (A5, A6, A7)
Smaller sizes like A5, A6, and A7 focus on portability over writing space. A5 is great for diaries or personal notebooks you can carry with your planner. A6 works well for quick notes when you’re out and about, and A7 fits right in your pocket for handy jotting.
Despite their compact size, these ring binders really useful. Because they are ring types, pages can be added or rearranged as needed, and they can even be used as sustainable memo pads.
A5 Size
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A6/A7 Size
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Kokuyo’s binder notebooks respond to diverse learning needs of users. By offering various sizes, you're free to choose whatever suits your needs. From document management to note-taking, picking the right size for your style and purpose helps you study smarter and work more efficiently.
