A very well designed Headphone with the cool factor. Comes with the large plug to support it’s vintage heritage! These earphones read Lenco 105-K and were made in Switzerland. Sound is suppose to be very good on these but I tested them and one side only works a little (on and off). The other side does not and the wire has wear on top. So sold as a display piece. The cones measure 10 cm or 4 inches in diameter. One size fits all. The leather parts are very clean and without wear. The white color of the cones has turned a little yellow over time. Check the attached video for lots of vintage Headphone info!