The ruling, measured
6.35 mm ruling
A quarter of an inch, exactly. This is what the United States calls narrow ruled. Twenty-seven rows on A5, twenty-four on 5 × 7.
The numbers
- Pitch
- 6.35 mm
- In inches
- 1/4 in (0.25 in)
- Standard
- US narrow ruled
- Rows per page, A5
- 27
- Rows per page, 5 × 7
- 24
- Rulings
- Lined
3 books use this pitch
Lined
The pitch either side
- 6 mm rulingfiner
- 7.14 mm rulingwider
