The Emergency Wallet card is perfect to contain all your emergency contact information. It is the same size as a normal debit/credit card, and all your emergency information can be completed on it. In the event of an emergency situation a police officer or ambulance personnel will be able to get valuable information about you that can save your life.
As an added benefit, you can use the 2GB USB memory device to store information that you would always keep with you.
It is lightweight and will fit into your wallet.