This package of Pressure Sensor Sheets comes with five sheets of pressure-sensitive material (also known as Velostat or Linqstat), each sheet measuring 3.75 in x 4 in (102mm x 95mm). When you press on the material, the resistance goes down depending on how hard you press.
These conductive plastic sheets have a resistance of 500 ohms per square, which is more conductive than other common pressure-sensitive sheets. They are perfect for making DIY pressure sensors and adding a gentle fade in and fade out effect to your project. Just sandwich a piece of this material between your paper switch to turn it into a pressure sensor!
Here's a video of some fun circuit tricks you can make with pressure sensors:
What to learn more? Here's a tutorial to get you started: