Leuchtturm1917 notebooks offer a variety of ruling options, including dot grid, lined, grid, and blank. The dot grid ruling is popular among bullet journallers because it provides a subtle guide without being too distracting. The lined ruling is a classic option that is perfect for taking notes or journaling. The grid ruling is a good choice for people who need to create tables or charts. The blank ruling is a versatile option that can be used for any purpose.