This 5-in-1 bookbinding ruler is a multi-purpose measuring and cutting tool designed to make cover preparation easier, faster, and more accurate. It combines several common bookbinding measurements and cutting guides into one compact tool.

The ruler is 3 mm thick, making it sturdy enough to use as a cutting guide while still being easy to handle.

With this ruler, you can easily create:
• 2 cm turn-in edges for covering boards
• A 3.7 mm spine gap for consistent case spacing
• Perfectly cut corners for clean cover turn-ins
• Rounded corners for covers and boards
• A matching rounded-corner cutting shape to ensure your cover material fits neatly around curved corners

This tool helps reduce measuring errors and keeps your covers neat and consistent, especially when making multiple books. It is ideal for:
• Case binding
• Journal covers
• Hardback books
• Decorative paper covers
• Rounded-corner notebooks

Designed for both beginners and experienced bookbinders, this ruler simplifies layout work and helps achieve professional results with less trial and error.

A practical all-in-one tool for accurate measuring, cutting, and shaping during book cover construction.