1. Sound Squared brand, S2-EXT6 6 foot long earphone extension cord, 3.5mm male and female connectors, black (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
Highest quality components for optimal performanceReinforced rubber coated copper wire

2. Avantree LONG CORD Earbuds with 16FT / 5M Extensive Cable for PC & TVs, Metal Stereo In-Ear Earphones with Coiled Cord, Spring Headphones with Mic - Eris (Click Link to Check Price on Amazon)
Editor's Rating : 9.4 out of 10
NO EXTENSION CABLE NEEDED: Easily share music with friends and use your earphones with your TV, laptop or computer from the comfort of your sofa - thanks to these earphones' 16ft (5m) super-long cable.HANDS-FREE CAPABILITY: Talk on the phone or listen to music while going about your everyday tasks with these soft in-ear earphones' built-in microphone, noise isolation feature and hands-free functions such as track previous/next/play and pause (if supported by your mobile phone).

3. Sound Squared brand, S2-EXT10 10 foot long earphone extension cord, 3.5mm male and female connectors, black (Click Link to Check Price on Amazon)
Editor's Rating : 9.3 out of 10
Highest quality components for optimal performanceReinforced rubber coated copper wire

4. EarphonesPlus Heavy Duty 12 ft. earphone, earbud extension cord; 3.5mm. (Click Link to Check Price on Amazon)
Editor's Rating : 9 out of 10
Heavy Duty earphone, headphone extension cord for the most demanding environmentsExtra thick (4mm) reinforced rubber coated copper wire

5. 3.5mm Stereo Headphone Extension 15 feet Straight (Click Link to Check Price on Amazon)
Editor's Rating : 9.6 out of 10
Industry standard stereo audio 3.5 mm (1/8") extensionNickel plated connectors