Sony MDREX36V Earbud Headphones (Blue) or (Black) for $11.99 shipped.  Here is a screenshot for your reference. The earphones feature a 9mm EX driver with a neodymium magnet, 6Hz to 23kHz frequency response, 100dB sensitivity, 16 ohm impedance, in-line volume control, and adjustable 47" cord.  Most places have the earphones for over $25.