Spine width for a 250-page book on cream paper

A 250-page 6 x 9 in paperback on cream paper has the estimated spine width and cover spread shown below. This example demonstrates why switching paper stock can change the spine even when page count stays the same.

How this differs from thinner white paper

The page count and trim size are the same as the standard 250-page example, but the paper thickness assumption is larger. That makes the spine wider and increases the full cover spread.

• Do not reuse a white-paper cover after switching to cream paper.
• Recalculate before centering spine text.
• Regenerate the official template for the selected stock.

When to choose this example

Use this as a comparison case when you are deciding between paper colours or when a designer asks how much the spine could move if the stock changes.

• Save separate estimates for each paper choice.
• Compare the spine width before final typography decisions.
• Confirm exact paper thickness with the selected printer.

Same page count, different stock

Example inputs used

• Page count: 250
• Paper thickness per page: 0.115
• Trim width: 152.4
• Trim height: 228.6
• Bleed: 3

These are starting values for this example. Measure or confirm your own figures, then open them in the book spine width calculator.

Assumptions and limits

• Uses 0.115 mm per page as a planning thickness for cream paper.
• Trim size 6 x 9 in (152.4 x 228.6 mm) with 3 mm bleed.
• Confirm exact paper thickness with the printer.

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