5" × 8" Paperback Cover Dimensions: 100 Pages, B&W White
How These Dimensions Are Calculated
pdf_width = (2 × 5") + 0.2252" + 0.25" = 10.4752"
pdf_height = 8" + 0.25" = 8.2500"
The 0.25" added to both width and height accounts for 0.125" bleed on each side. Your cover image must extend into this bleed area to avoid white edges after trimming.
Cover Layout (Left to Right)
Key Specifications
- Trim size: 5" × 8"
- Page count: 100 pages
- Paper type: Black & White on White Paper
- Bleed: 0.125" on all outer edges
- Safe margin: 0.25" inside trim line
- Spine text: Allowed (100 ≥ 79 pages)
- Barcode reserve: 2" × 1.2" on back cover
- Resolution: 300 DPI, RGB color space
Dimensions in Multiple Units
| Measurement | Inches | Points (pt) | Millimeters | Pixels (300 DPI) |
|---|---|---|---|---|
| PDF Width | 10.4752" | 754.21 | 266.07 mm | 3143 px |
| PDF Height | 8.2500" | 594.00 | 209.55 mm | 2475 px |
| Spine Width | 0.2252" | 16.21 | 5.72 mm | 68 px |
The 80–149-page range at compact trim sizes is the sweet spot for genre novellas, cozy mystery entries, and young-adult standalone short novels. Spine widths in this window run from roughly 0.18" to 0.34". Romance authors publishing in rapid-release series often gravitate toward these dimensions for cost-efficient printing and easy readability. At 79 pages exactly, you clear KDP's spine-text threshold — but keep text small (6 pt minimum is a practical floor) given the narrow spine. Verify your exact PDF width from the calculator above before creating your cover template in any design tool.