Amazon.com: Headset Extension Lead/Extension Cable with Break-Proof Metal Plug – 20ft (Ideal for Connecting a Gaming Headset or Headphones with Microphone, TRRS, 4-Pole, 3.5mm Male to Female) by CableDirect : Everything Else
Ernie Ball Headphone Extension Cable 3.5mm to 3.5mm 20 ft. Black | Guitar Center
Amazon.com: 6 Foot 3.5mm Headphone Extension Cord (AH735R) : Perry Como and Eugene Ormandy: Electronics
Shure SRH440A Closed-back Studio Headphones with Hanger and Extension Cable | Sweetwater
Headphone Extension Cables
Audio-Technica ATH-M50x Headphone Bundle with Desk Hanger and Extension Cable | Sweetwater
Best Buy: Insignia™ 20' Headphone Extension Cable and Adapter Kit Black NS-HZ306
BASN YC100 3.5mm In-ear Headphone Extension Cable
Amazon.com: Joymiso 16Ft Extra Long Cord Earbuds Headphones for TV PC Laptop with Mic, Volume Control, Spring Coil Wire & Extension Cable, 3.5mm Wired Over Ear in-Ear Computer Earphones for Kids Women