These headphones are brand new and unused

these are a one size set of headphones and have no extra buds for different sizes

Performance
- Speaker Diameter: 10mm
- Frequency range: 20Hz-20KHz
- Sensitivity: 95dB
- Impedance: 16 ohms
- The wire length: 130cm
- Applicable to the 3.5 foot interface of intelligent mobile phone
- The stereo output dynamic combination
- The built-in mic hansfree

If you require anymore information please don't hesitate to ask.