Disclosed is an armrest assembly for a vehicle seat such as a pilot seat positioned in an aircraft cockpit. The armrest assembly generally includes a pivoting armrest and an arm pad repositionable relative to the armrest to change the arm pad width. The arm pad includes two functional sides each having a different width dimension. The arm pad is coupled to the armrest such that sequential translational and rotational motion of the arm pad moves one of the first and second sides into a use position atop the armrest and the other of the first and second sides into an out of use position alongside the armrest. The armrest assembly according to the present disclosure is ideal for use in tight quarters within the flight deck, among other installation environments requiring a functional armrest.