Clingy Thingies® are made with a special cling technology. They are not sticky to the touch, yet they stick to any smooth surface and can be easily removed. You can even use water to rinse lint or dirt off the back surface. Clingy Thingies® can be used again and again without leaving any mess or residue. They also feature a write-on/wipe-off surface, perfect for notes, labeling, and reminders.The Clingy Thingies® Home Sweet Classroom Calendar Set has 141 repositionable accents and labels that provide eye-catching reminders and add color and fun to your organization. All pieces have a write-on/wipe-off surface. Calendar base is 17" x 12" .