Bullet journal ruler

I recently started bullet journaling again. After selecting an A6 6-hole notebook to start journalling, I needed a way to set out a few pages for my logs. This has a 1mm ruler on the side. The slots are 2/3, 1/2, and 1/3 the length of an A6 page. I've also got 1/2, 1/3, and 1/4 the width of an A6 page.