AT-A-GLANCE Erasable Wall Calendar 2016, 90 / 120-Day Undated, Reversible, Horizontal, 36 x 24 Inch Page Size (PM239P28) Horizontal, erasable wall calendar covers 90 / 120-days letting you make and view plans over three or four months at a time. Write-on / wipe-off surface lets you change plans when necessary. Reversible format offers you a choice of planning time frames: side 1 is an undated 90-day calendar format while side 2 is an undated 120-day calendar format. Blocks for scheduling are 1.63 in. x 3 in. on side one; 2 7 / 16 in. x 1.81 in. on side two. Wet-erase marker included. Page size 36 in. x 24 in.; overall size 36 in. x.13 in.. Calendar is undated so that you can start using it at any time. Includes notes space for making next months plans. Bright white background allows for easier viewing and reading. Printed on paper containing 30% post-consumer material.