No thumb tacks, tape or adhesive required. 12 individual loose sheets cling to almost any surface via a static charge. 14-month calendar reference on the bottom of each sheet. Notes section on the side to quickly jot down monthly to do lists. Can be used with permanent or erasable markers. Ink will not bleed through. Erasable dry erase marker included. Sheet Size: 17 x 22; Page Color/Theme: White; Calendar Term: 12-Month (Jan.-Dec.); Edition Year: 2011.