Wow -- now this is a small Bluetooth headset, the Motorola H5 Miniblue:

Introducing a revolutionary Bluetooth headset that really works with you. Designed around the way your body works, the in-ear microphone and speaker of the Motorola H5 MINIBLUE pick up your voice through the ear canal so conversations come in loud and clear - even in a noisy environment. And measuring only 33 x4 1millimeters this barely-there headset fits perfectly inside your ear for pristine, unobtrusive communication. This petite powerhouse packs in battery power so powerful - you can chat wire free for up to approximately 7.5 hours using the included portable charging base. It's amazing how empowering and freeing this device can be!