I bought this to add some screen protection to my old handhelds ranging from a few Nintendo Game & Watch games to Game Boy to Game Boy Advance to DS to Neo Geo Pocket.....  Each of the 10 sheets measures 4 1/8" by 3", the diagonal measures 5 1/8". The screen protection film appears to be of the last generation, not one of the new Japanese PET film types which leave little bubbles and are easier to apply. This one requires some effort and pretty much always leaves bubbles which are difficult to get rid of, but they don't both me at all. The quality feels solid and you can feel you're protecting your LCD screen. Each sheet is also easy to cut with sharp scissors but i'm sure if you have a paper cutter that's even better. Easy to trim.