A previous reviewer commented that these were not a perfect fit (Rohit) and I'd agree. However, having used a pair of scissors carefully, they're now pretty good and the fact that there's 10 in a pack, allows for the several attempts to get it right (dust seems to get trapped VERY easily).
They stick down well & (so far) haven't lifted at the corners. The touchscreen phone doesn't appear to have suffered from having these stuck on top!
Overall I'm happy with my purchase, but they could have been better from the point of view of an accurate fit.