KDP trim size recommender
Book layout guide
KDP trim sizes explained, genre by genre.
Trim size fixes the page dimensions before formatting begins. Choose it from the list KDP accepts.
Checked:
✓6x9 is the default for nonfiction✓5x8 and 5.5x8.5 serve fiction✓Page count moves with trim size
The sizes readers expect
Fiction reads best at 5x8 or 5.5x8.5. Nonfiction, workbooks, and image-heavy books use 6x9 and up.
| Trim size | Best for | Pages per 60,000 words |
|---|---|---|
| 5x8 in | Pocket fiction | ~270 |
| 5.5x8.5 in | General fiction | ~250 |
| 6x9 in | Nonfiction, memoirs | ~230 |
| 8.5x11 in | Workbooks, manuals | ~120 |
Choosing before you format
The book sizes tool lists every accepted KDP trim size with page estimates for your word count.
FAQ
Frequently asked questions
Which trim size is most profitable on KDP?
6x9 keeps printing cost per page low for nonfiction. Fiction profitability depends on page count and your price band.
Can I change trim size after uploading?
Yes, but the interior must be re-exported and the cover rebuilt for the new size.
Pick the right size before you format.
Browse accepted KDP trim sizes with page estimates for your draft.