First of all, I have added an image that you can use to judge the size of the protector on an iPhone 3G. I know it's hard to see a clear protector in a small photo, but in the image my iPhone is in&nbsp;<a data-hook="product-link-linked" class="a-link-normal" href="/this-case/dp/B001CHBNZ6/ref=cm_cr_arp_d_rvw_txt?ie=UTF8">this case</a>, which perfectly covers the edges of the screen protector on all sides, so there's no chance of pulling up the corners or getting dust, etc. around the edges of the protector.  There's a cut out semi-circle for the Home button.