These patches work great, are slightly larger than the little round joke ones, and come with a generous amount of rubber cement.To use, scuff the tube with sand paper, apply thin film of cement, allow to dry, and only then apply a patch. Pound the patch with your fist, paying attention to the edges. Done.They come in a large foil sheet and have a paper backing. Do not bother to remove the thin paper backing, it causes no issue and doesn't matter once it's in your tire. Trying to remove it will only peel up the edge of your patch job, and serves no purpose.These patches are so good I even use them to patch holes in my tubeless tires. When I get home after using bacon strips, if I don't trust the field repair, I pop the tire off in that location, clean it with alcohol, allow it to dry, scuff with sandpaper and apply cement and a patch. I have repaired many tires this way and now accept "donated" tires my friends have given up on.Finally used up all 48 patches and am coming back here for more!