Expert Shield - THE Crystal Clear Screen Protector for: Canon EOS Rebel T4i / 650d *Lifetime Guarantee* Your Expert Shield comes pre-cut to the size of this screen. This one measures 65mm by 45mm. Your Expert Shield comes with a no bubble guarantee. Your Expert Shield also comes with a no scratch guarantee. Actually, your Expert Shield is pretty much guaranteed to make you happy (we guarantee it). Oh, and those guarantees last for the lifetime of your device. Because we love you.