KDP (or Amazon Print on Demand for books, if you preffer) book sizes extracted from their File Setup Calculator (v5) as of today, 20200418:
| in | cm |
|---|---|
| 5,00 × 8,00 | 12,70 × 20,32 |
| 5,06 × 7,81 | 12,85 × 19,84 |
| 5,25 × 8,00 | 13,34 × 20,32 |
| 5,50 × 8,50 | 13,97 × 21,59 |
| 6,00 × 9,00 | 15,24 × 22,86 |
| 6,14 × 9,21 | 15,60 × 23,39 |
| 6,69 × 9,61 | 16,99 × 24,41 |
| 7,00 ×10,00 | 17,78 × 25,40 |
| 7,44 × 9,69 | 18,90 × 24,61 |
| 7,50 × 9,25 | 19,05 × 23,50 |
| 8,00 ×10,00 | 20,32 × 25,40 |
| 8,25 × 6,00 | 20,96 × 15,24 |
| 8,25 × 8,25 | 20,96 × 20,96 |
| 8,50 × 8,50 | 21,59 × 21,59 |
| 8,50 ×11,00 | 21,59 × 27,94 |
| 8,27 ×11,69 | 21,01 × 29,69 |
If you need a quick view, you can download the following poster that can be printed on a a3 paper size:
amazon print on demand book sizes