Cut My SIM: The $30 SIM-To-MicroSIM-To-SIM ConverterS

Sure, you could take the DIY route to turn your SIM card into a MicroSIM and vice versa or you could simply purchase Cut My SIM, a clever, glorified hole-punch.

Cut My SIM is available for preorder and supposedly is a mistake-proof way of chopping up your SIM card. As a bonus, the clean cut means that you can change your homemade MicroSIM right back into a regular SIM without taking a messy DIY route. [Cut My Sim]