Book Spine Width
Estimate paperback spine width from page count and measured paper caliper.
Use the measured thickness of one sheet or your printer’s stock specification. The initial 100 μm value is an example, not a paper standard. GSM does not uniquely determine thickness.
Estimated spine width
10 mm
100 leaves × 0.1 mm per sheet + 0 mm allowance.
This is a material-thickness estimate. Use the binder’s final spine measurement or cover template before production. Cover stock, compression and binding method can change the required width.