Welcome to the 'Book Marks' Menu.
Standard book mark sizes are 1.5"X7", 2"X8" and 8.5"X2.75". However, the other sizes in this menu can be used as book marks as well.
Also 8.5"X3.5" and 8.5"X3.66" are used for creating rack cards for your business as well. And the 8.5"X2.75" is used for custom tickets.
The custom book marks in this menu’s design tool are pre set for 8.5"X2.75".