5" × 8" Paperback Cover Dimensions: 350 Pages, B&W White
PDF Width
11.0382"
794.75 pt
PDF Height
8.2500"
594.00 pt
Spine Width
0.7882"
56.75 pt
How These Dimensions Are Calculated
spine_width = 350 pages × 0.002252" = 0.7882"
pdf_width = (2 × 5") + 0.7882" + 0.25" = 11.0382"
pdf_height = 8" + 0.25" = 8.2500"
pdf_width = (2 × 5") + 0.7882" + 0.25" = 11.0382"
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)
[0.125" bleed] [Back Cover 5"] [Spine 0.7882"] [Front Cover 5"] [0.125" bleed]
Key Specifications
- Trim size: 5" × 8"
- Page count: 350 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 (350 ≥ 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 | 11.0382" | 794.75 | 280.37 mm | 3311 px |
| PDF Height | 8.2500" | 594.00 | 209.55 mm | 2475 px |
| Spine Width | 0.7882" | 56.75 | 20.02 mm | 236 px |
A 300–499-page book at a compact 5"–5.25" × 8" trim has a spine width of 0.68"–1.12". This is comfortable territory for thriller series, epic romance installments, and complete story-arc novels that need breathing room. Stephen King frequently publishes in 6" × 9" at these counts, but compact-trim fans prefer smaller trim sizes for portability. The spine is wide enough for bold title text and author name with room to spare. Ensure your spine-text safe margin is at least 0.0625" from each spine edge as a minimum; 0.1" is more reliable in practice.