Urid Dal's Hatshop proudly presents a sculpted one prim hat. Since it can easily be stretched in all three directions it's a lot easier to adjust to fit your personal needs than linked prim hats. Should you mess up the hat just set it to the default dimensions listed in the obect description.
Please visit Urid Dal's Hatshop in Sponsa (120,126,29) and get this hat at an intrudoctury prize if you are so inclined.