Headphone Jack and Plugs: Everything You Need to Know - Headphonesty
Differences Between 2.5mm, 3.5mm & 6.35mm Headphone Jacks – My New Microphone
Headphone Jack and Plugs: Everything You Need to Know - Headphonesty
25mm Male to 35mm Female Adapter2 Pack 35mm Female to 25mm Male Audio Adapter Converter Headphone Earphone Headset 25mm to 35mm 3 Ring Jack Stereo or Mono 25Male to 35Female - Newegg.com
Amazon.com: 6.3mm 1/4" Male Plug to 3.5mm 1/8" Female Jack Stereo Headphone Audio Adapter (Pack of 10) : Electronics