# KDP trim sizes for paperback and hardcover books

> What trim sizes does Amazon KDP support for paperbacks and hardcovers?

On kdp.amazon.com, paperbacks come in 16 listed trim sizes from 5 x 8 in to 8.5 x 11 in, plus custom sizes 4 to 8.5 in wide and 6 to 11.69 in tall. Hardcovers have five sizes: 5.5 x 8.5, 6 x 9, 6.14 x 9.21, 7 x 10 and 8.25 x 11 in. The default and most common US size is 6 x 9 in, and any size wider than 6.12 in or taller than 9 in is a large trim with higher printing costs.

| Fact | Value |
| --- | --- |
| Default and most common US size | 6 x 9 in (152.4 x 228.6 mm) |
| Paperback sizes listed (kdp.amazon.com) | 16 |
| Paperback custom width | 4 to 8.5 in |
| Paperback custom height | 6 to 11.69 in |
| Hardcover sizes | 5 |
| Large trim threshold | Wider than 6.12 in or taller than 9 in |

## Paperback trim sizes (kdp.amazon.com)

All sizes are width x height.

**Regular trim:** 5 x 8 in, 5.06 x 7.81 in, 5.25 x 8 in, 5.5 x 8.5 in, 6 x 9 in.

**Large trim:** 6.14 x 9.21 in, 6.69 x 9.61 in, 7 x 10 in, 7.44 x 9.69 in, 7.5 x 9.25 in, 8 x 10 in, 8.25 x 6 in (landscape), 8.25 x 8.25 in, 8.27 x 11.69 in (A4), 8.5 x 8.5 in, 8.5 x 11 in.

If none fits, paperbacks accept a custom size between 4 and 8.5 in wide and 6 and 11.69 in tall.

Paper and ink availability is broad: black ink on white, cream or groundwood paper and premium color work on every listed size, while standard color is not available on 8.27 x 11.69 in.

## Hardcover trim sizes

Hardcovers are limited to five sizes: 5.5 x 8.5 in and 6 x 9 in (regular), and 6.14 x 9.21 in, 7 x 10 in and 8.25 x 11 in (large). Hardcovers support black ink on white or cream paper and premium color; standard color and groundwood are not offered. Hardcover is not available on kdp.amazon.co.jp, which has its own paperback size list (for example 4.06 x 7.17 in and 5.83 x 8.27 in).

## Why "regular" or "large" matters

KDP uses the regular/large split, not the exact size, for printing cost. A book at 6.14 x 9.21 in pays the large-trim rate even though it is only slightly bigger than 6 x 9 in.

## Common mistakes

- Formatting the interior before choosing the trim. Margins, page count and cover width all depend on it.
- Picking 8.5 x 11 in for a long book: black ink white paper tops out at 590 pages on that size versus 828 pages on 6 x 9 in.
- Assuming a hardcover can reuse any paperback size. Only the five hardcover sizes work.

Amazon changes these rules; the linked KDP help pages are the authority.

## FAQ

**Which trim sizes count as regular?**

On the paperback list, 5 x 8, 5.06 x 7.81, 5.25 x 8, 5.5 x 8.5 and 6 x 9 in are regular. Everything from 6.14 x 9.21 in upward is large and costs more to print.

**Can my paperback and hardcover use the same interior file?**

Yes, if the manuscript meets both formats' trim size and page count requirements. Update any ISBN printed inside to match the hardcover's own ISBN.

**Are all sizes eligible for Expanded Distribution?**

No. Eligibility depends on trim size and paper; for example 8.25 x 6 and 8.25 x 8.25 in are not eligible with any ink and paper combination.

## Sources

- https://kdp.amazon.com/en_US/help/topic/GVBQ3CMEQW3W2VL6
- https://kdp.amazon.com/en_US/help/topic/G201834180
- https://kdp.amazon.com/en_US/help/topic/GAVW3FZZAKA2KY3B
- https://kdp.amazon.com/en_US/help/topic/GQTT4W3T5AYK7L45

Last checked: 2026-11-09. Page: https://kdp123.com/facts/trim-sizes/. Data: CC BY 4.0, kdp123.com.