Typically any headsets are molded to the figures heads. There are a number of styles and types of headsets. So exact shape isn't critical. These are known in the aviation world as David Clarks...aka David Clamps as they squeeze your head like a vice. 
In my video I wear a pair of old GI issue headsets.
Punch out a couple discs from thin styrene, add a foil "headband" and a fine wire for the mic boom...and you have a headset.