This here is your standard A-B USB cable, for USB 1.1 or 2.0. Perfect for connecting a PC to your Arduino, USBtinyISP, or USB Boarduino (among other things).
6" long from end to end, its a little more compact than Adafruit's classic 3' long cable
Adafruit had these made to Adafruit's specifications, available in Adafruit Black
4.6mm / 0.18in diameter