For those who are brave enough to cut your SIM Card to make them fit in your iPhone 5 here are some simple instructions and diagrams. (Or even cutting your Mini Sim to Fit into your iPhone4/4S.
Download, Print out and make sure what you have printed matches up with the correct dimensions at the bottom of the PDF.
I take no responsibility for cutting your SIM incorrectly or killing your SIM or even if the diagrams are correct.
You view the instructions/diagrams at http://www.airportal.de/nanosim