Book Sizes

Understanding Book Sizes

A guide to UK and US editions — because size actually matters

If you have been in the book collecting game for a hot minute, you will know the pain of mismatched size books. It could be something as simple as confusion between a US and a UK edition — getting a UK edition of Book 1 and a US edition of Book 2. It could be a change in printer, change in location of printing, change in publisher — honestly, it could be anything.

To try and shed a little bit of light on the murky industry that is publishing, we are going to break down the differences between book sizes in both UK and US editions.

To make it easier for you, so you don't have to dive down the rabbit hole yourself, we've put together this hopefully clear (and not too confusing) guide.

And of course, we also have to contend with the Imperial vs Metric systems — because why not make things a little trickier, right?

Because of the differences in UK and US sizes, we do our best to note with each book whether it is a UK or US edition so that you know exactly what you are getting and are comfortable it will fit in with your set or bookcase. If at any point you need some extra information, reach out to us and we will help you!

please note

These sizes are estimates. There's always a small tolerance of a few millimeters in each direction due to the different machines used by publishers, which can affect the final size of the book. It's just the nature of the publishing world!

Book size comparison — B-Format, Demy, Trade Paperback and Standard Hardcover

most common in NZ

UK Editions: Metric System

Paperbacks (B-Format) / Softbacks / Mass Market Paperbacks (MMPB)

These are the smaller, later releases that often come out a few months after the initial launch. They tend to use lower quality materials.

Size: 197mm x 128mm

Trade Paperbacks (TPB) / Royal

The standard edition is released at launch, typically with higher quality materials.

Size: 233mm x 153mm

Standard Hardcovers

The inside pages are the same size as the Trade Paperback, but the hardcover has larger covers to protect the pages. Often, these will come with a dust jacket.

Size: 234mm x 163mm

Demy Hardcovers

These sit somewhere between a B-Format Paperback and a Trade Paperback for size. More often than not, these will come with a dust jacket.

Size: 216mm x 147mm

more variation in sizing

US Editions: Imperial System

Paperback / Paperbound / Digest

These are smaller editions released later on, typically using lower quality materials.

Size: 8.1in x 5.5in (203mm x 139mm)

Large Print / US Trade

This is the standard edition that launches initially, often with higher quality materials.

Size: 9.1in x 6in (229mm x 153mm)

Hardcover

Hardcovers in the US can vary quite a bit in size, often depending on production costs and the number of pages. As with UK editions, the page size is typically the same as the Trade edition and often comes with a dust jacket.

Size: 9 – 11in x 6 – 8.5in (229 – 292mm x 153mm – 215mm)

Demy Hardcovers

These sit somewhere between a B-Format Paperback and a Trade Paperback for size. More often than not, these will come with a dust jacket.

Size: 8.5in x 5.88in (216mm x 147mm)