Bestselling Monster Grid is for those who really fill up their calendar! Simplify your life with enough space to track office projects, appointments, birthdays, or plan for a very busy household. This blockbuster twelve month calendar is easy to read and big enough for personal and professional dates. Each grid space is 2 1/4 by 4 inches. The Monster Grid includes international holidays, moon phases and extra space each month for writing notes. Opens to 16 1/2 by 24 inches.