MoxieRule™ FN Journal Ruler for Field Notes
It's a straight edge, a ruler, a column and row guide, a bookmark, and likely to be one of the most useful planner accessories you own. It is made of flexible, durable, plastic, with 4.7mm increments printed on the left edge that perfectly align with a standard Field Notes journal grid. The center of the FN Journal Rule provides total box count page divisions at a glance. Divide your page into 2, 3, 4, 5, 7, or 9 equal columns or rows.