Summary: Ok, I know I have a small head, but I can usually adjust these things small enough for my head. Even on the smallest size it almost wraps around below the opposite ear... Not comfortable. I've been wearing headsets for years and this one is awful. FYI my hat size is a size 7-71/8.
Summary: I've bought many headsets for my land phone and several of these. this is the best, headset, fits snugly, no screeching because the jack doesn't fit properly, volume is good and price very reasonable. Intend to buy only this brand from here on.