Pocket watch size?

A pocket watch (or pocketwatch) usually is a strapless personal timepiece that is carried in a pocket. The display is traditionally analog. Pocket watches generally have a chain to be secured to a waistcoat, lapel, or belt loop (the chain or ornaments on it being known as fobs), as well as a hinged cover to protect the face of the watch. Such covers are not always present. Also common are fasteners designed to be put through a buttonhole and worn in a jacket or waistcoat, this sort being frequently associated with and named after train conductors.