The Mammoth Grid 2014 is the biggest grid calendar available! Each grid box is 3 inches wide and 5 1/2 inches long. Great in any environment that uses a shared calendar: a classroom, club, workplace, you name it. Bright, colorful, and easy to read, includes holidays, moons, and extra space for writing notes. The wire-o binding provides support for this humongous calendar. Opens to 22" x 34".