Each tab is about 1/2 x 1/2 inch. Most are rounded on one side (unlike the photo). We will ship whatever shape we have in stock at the time, but the size is about the same. To apply lift a tab off the roll with the protective paper attached. Press it against whatever you want it to stick to and lift off the paper tab to expose the other adhesive surface.
There must be other applications (EMF?) this could be used on. I also have a non conductive version in rolls of 500.