Notebooks literally do come in all shapes and sizes. Whilst there are some common sizes, many notebook creators have their own, special sizes...which can make buying the perfect notebook size online a little tricky, especially as it's not in front of you. (We've probably all had the experience of "It looked bigger/smaller in the picture!) So to help you decipher notebook descriptions and names, we've included below the ultimate guide to notebook sizes. We hope you find it helpful in ensuring you get the size you want, not the size you imagine! (If size is only one of the things you're interested in, also check out our notebook buying guide or our top 10 fountain pen friendly notebook guide.)

A few quick rules of thumb on notebook sizes

- "Large" is not a specific or exact size. There is a LOT of size variation between "large" notebooks as this is a term notebook manufacturers use to describe their own notebooks, relative to those within their own brand, not relative to other notebook brands.

- If you're shopping online, get a ruler out and physically sight the actual measurements in a listing. Your mental perception of 20cm is often quite different to what it is when you actually see it in front of you on a ruler.

- When we're talking notebook sizes in this post, we mean 'dimensions', not thickness or number of pages. However, when you are notebook shopping, ensure you understand the number of sheets vs pages, as both can be used. 1 sheet is usually 2 pages (a back and a front).

Moleskine notebook sizes

Notebook sizes - Standard paper sizes

The most easily understandable and consistent notebook sizing are those that use 'standard' paper sizes. These most commonly include the A series and B series, these come from ISO print standards, which means they are consistent.

In Australia, and many other nations, A4 is the most common paper size  it's the size we use in photocopiers, for example. It's also a common notebook size. A5 is also extremely common in notebooks. (In fact, the only countries this standard is not common is the USA, Canada & Mexico).

The B series of standard sizes is also quite common, especially in Japanese and Korean notebooks.

TIP: The handy way to remember the relationship of any of the A sizes, is that each size is half of the smaller number. So A4 is half of A3, A5 is half of A4, A6 is half of A5 and A7 is half of A6.

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Notebook size chart - A series

Paper notebook size chart

Notebook paper size measurements A series:

A3: 297 x 420 mm (11.7 x 16.5 in)

A4: 210 x 297 mm (8.3 x 11.7 in)

A5: 148 x 210 mm (5.8 x 8.3 in)

A6: 105 x 148 mm (4.1 x 5.8 in)

A7: 74 x 105 mm  (2.9 x 4.1 in)

Notebook size chart - B series

Notebook paper size chart

Notebook paper size measurements B series:

B5: 176 x 250mm (6.9 x 9.8 in)

B6: 125 x 176mm (4.9 x 6.9 in)

B7: 88 x 125mm (3.5 x 4.9 in)

When is A5 not exactly A5?

At Milligram, we usually include the relevant standard size in notebook's title AND we'll include the measurements (this will also be in the product specifications). The measurements are needed because sometimes a notebook brand isn't quite A5, for example, but is extremely close. Most people don't care, or won't notice, a 1cm difference in a notebook that we've denoted A5.

When it does matter; however, is when you're adding a notebook cover or inserting into a compendium. In that case, be sure that the measurements correspond to the cover you're using, or the charts above if you're looking for something exactly A5, B6, etc.

Notebook size charts for popular notebook brands

While we sell many, many notebook brands at Milligram, three of the most popular brands are Moleskine, Delfonics Rollbahn and Rhodia. We've specifically created some size charts, by ranges in these brands below, to show measurements and also deliver some perspective on how their sizes sit relative to others in the range. We've also included a Palomino Blackwing pencil in each diagram to lend some perspective to each diagram.

Moleskine Notebook sizes

Moleskine do not use standard paper sizes for their notebooks  all their sizes are custom to Moleskine.

Moleskine cahier notebook sizes Moleskine notebook sizesMoleskine Cahier Notebook size measurements

Pocket: 9 x 14 cm (3.54 x 5.51 in)
Large: 13 x 21 cm (5.11 x 8.27 in)
Extra Large: 19 x 25 cm (7.5 x 9.84 in)

Moleskine notebook sizes Moleskine notebook sizes

Moleskine Professional Notebook size measurements

Large: 13 x 21 cm (5.11 x 8.27 in)
A4: 210 x 297 mm (8.3 x 11.7 in)

Moleskine Classic Notebook Sizes Moleskine notebook sizes

Moleskine Classic Notebook size measurements

Extra Small: 6.5 x 10.5cm (2.55 x 3.93 in)
Pocket: 9 x 14 cm (3.54 x 5.51 in)
Large: 13 x 21 cm (5.11 x 8.27 in)
Extra Large: 19 x 25 cm (7.5 x 9.84 in)

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Delfonics Rollbahn Notebooks sizes
Delfonics notebook sizes Delfonics notebook sizes

Delfonics Rollbahn Notebook size measurements

Pocket: 10 x 15 cm (3.93 x 5.9 in)
Large: 14 x 18 cm (5.51 x 7.08 in)
Extra Large: 21 x 26 cm (8.27 x 910.23 in)

Rhodia Notepad and Notebook sizes

Rhodia notebook sizes

Rhodia notebook size chart

Rhodia Notebook size measurements

Pad 11:  7.4 x 10.5 cm (2.91 x 4.13 in)
Pad 12: 8.5 x 12 cm (3.35 x 4.72 in)
Pad 13: 10.5 x 14.8 cm (4.13 x 5.82 in)
Pad 16 (A5): 14.8 x 21 cm (5.82 x 8.27 in)
Pad 18 (A4): 21 x 29.7 cm (8.27 x 11.69 in)
Pad 19: 21 x 31.8 cm (8.27 x 12.52 in)
Pad 38: 42 x 31.8 cm (16.53 x  12.51 in)


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