The result is an extraordinary design which could just be the world's best domestic business class seat. Let's take a closer look. JetBlue's duo and solo Mini seats are largely physically identical, up to a generous 22.3 inches (56.6cm) wide and converting in to a fully flat bed stretching up to 6’8” (203cm). The first thing you notice when sitting in a Mint seat for any period of time is how incredibly comfortable it is.