Pro 3.5mm Stereo Jack Plug to 6.35mm 1/4 inch Stereo Male Socket Adapter

Ex-Pro® Professional Quality Gold Plated STEREO Audio Adaptor 6.35mm (1/4 INCH) Jack Socket to 3.5mm Jack Plug - for Headphones  6.35mm (1/4 INCH) Jack Socket  3.5mm Jack Plug  Gold Plated Metal Adapter

Price: £ 3.92 from Boxed2me