A:AnswerI don’t know about the switch but on PS4 and Xbox( if older model you can buy an adapter) they have headphone jacks on the controller to use headphones
A:AnswerDiagonally, from upper left to lower right corner of the screen itself, it is 23" The outside measures a few more inches added to the base, and the outer edges add another 3/4 inches or so to each side
