Post-it® Helsinki Pop-Up Notes 3" X 3" Adhesive Provides A Secure Hold To Ensure Your Colored Post-It Notes Stay In Place. Pop-Up Post-It Notes Are Easily Removable Without Damage. 3" X 3" Post-It From Stylish Collections Are Perfect For Making Bright And Memorable Reminders All Over Your Space. The Notes Conveniently Pop-Up One At A Time, So You Can Grab One, Jot Down A Note And Keep Moving.