Phihong's PSM03x series is part of a string of very small adapters and mobile chargers. Previously available in black, the series is now available in white and includes an Australian version.

Measuring at just 1.65 x 1.65 x 0.87 inches and weighing 3 ounces, the 2.75 W fixed wall-plug adapters are available in four standard versions for the United States, United Kingdom, continental Europe, and Australia. The USB adapters feature a constant-current/constant-voltage control that allows for a quick charge on lithium batteries and bears a 5-star standby rating and IEEE1725 certification as a mobile phone charger.

See the original PSM03X line here