Photo used from http://www.pcmag.com/article2/0,2817,2425405,00.asp Feel free to go to their website. They have some really interesting things there!!!!
This is the Earin. It is projected to come out around April of 2015. It is a wireless earbud or headphone (which ever you perfect to call it) that connects to play music through Bluetooth. To me they kind of seem like ear plugs. I found them on Amazon even though they aren't out yet, for $16.99 with prime and get it by May 7th. Without prime it is $49.99. They weigh 0.18 ounces, are only 0.78 inches tall, and 0.55 inches in diameter. If they are too small and your afraid they might get stuck in your ears you can order them with Concha locks so that they will stay put!