Notebook: A5 or B5?

Notebook: A5 or B5? Figure It Out Instantly.

Ever grabbed a notebook that wouldn’t fit your bag?

Or one so tiny you could barely scribble a sentence?

Let’s fix that. Here’s the only size guide you’ll ever need.

A6 (105×148 mm) 👛 Pocket-sized

Your go-anywhere companion. Slips into a jacket pocket, perfect for quick thoughts, to-do lists, or travel journaling. Cute, but not for long writing sessions.

A5 (148×210 mm) ⭐ The all-rounder

The Goldilocks of notebooks — not too big, not too small. Fits most bags, gives you real writing space without the bulk. Business meetings, bullet journals, daily planners — this is your pick.

B5 (176×250 mm) 📚 The serious one

For when you have a lot to say. Students love it for lecture notes. Professionals use it for project planning. More room, more freedom — just make sure your bag can handle it.

A4 (210×297 mm) 🏢 The full-size beast

Straight-up paper size. Think office reports, sketches, mind maps. Great for desk work, terrible for carrying around. If portability matters, skip this one.

Still not sure? Ask yourself:

Where will I use it? → Desk = B5/A4. On the go = A5/A6.
What’s it for? → Quick notes = A6. Daily journal = A5. Heavy writing = B5.
What bag do I carry? → Small bag = A6. Regular bag = A5. Backpack = B5.
Bottom line: When in doubt, go A5. It’s the one size that almost never disappoints.