The have a internal mesh that is adjustable, allows for sizes between medium to large in my opinion. I have no idea my head size to be honest
I have never had a passenger that ever had issues . My head is really in between large and medium , I find this fits just fine when adjusted . My son has a large melon, it fits his head ok too. I think because the ear pieces do not have a rigid cup it allows a little wiggle room, the adjustable mesh
allows for a slight variation in head size. Tried it on tonight, pictures attached.
I have never had a passenger that ever had issues . My head is really in between large and medium , I find this fits just fine when adjusted . My son has a large melon, it fits his head ok too. I think because the ear pieces do not have a rigid cup it allows a little wiggle room, the adjustable mesh
allows for a slight variation in head size. Tried it on tonight, pictures attached.