Pololu - Thin (2mm) USB Cable A to Micro-B, 6 ft, Low/Full-Speed Only

This Micro-USB cable is extremely thin (2mm diameter), light, and flexible, which makes it easier to use than bulkier cables that tend to take up more desk space and pull small devices off tables. The 6 ft (1.8 m) cable is terminated on one end by a Type-A USB plug and on the other by a Micro-B USB plug. Note that this cable is only capable of low- and full-speed USB, not high-speed USB.

Pololu - Cables and Wire

StarTech.com 15cm 6in Short Slim USB 3.0 A to Micro B Cable M/M - Mobile Charge Sync USB 3.0 Micro B Cable for Smartphones and Tablets (USB3AUB15CMS)

Pololu - USB Adapter A to Mini-B

Ultra-thin and flexible A to Micro-B USB Cable - 877.522.3779

Tripp Lite 6 ft. Hi-Speed USB 2.0 to USB Mini-B Cable (M/M), Coiled, USB Type-A to Mini-B (U030-006-COIL) : Electronics

StarTech.com 15cm 6in Short Slim USB 3.0 A to Micro B Cable M/M - Mobile Charge Sync USB 3.0 Micro B Cable for Smartphones and Tablets (USB3AUB15CMS)

Our Black 6 foot Micro USB Cable meets the USB 2.0 Hi-Speed specification, it is also backward compatible with 1.0 and 1.1. The type A male end plugs into your computer, laptop or wall charger and the micro typeB male connector plugs into your device. The contacts in the connectors are gold plated to prevent corrosion for the life of the cable. The USB Micro B connection is a very commonly used connection on cell phones, GPS units, PDAs and other mobile devices.