Beer on the brain! From "Blarney Stone Cold Sober" to "O'My Head", the McDrunk O'Meter Hat traces your sobriety—or lack thereof—with accuracy this St. Patrick's Day! Bright green baseball hat is made of 100% Polyester, with an adjustable plastic strap in the back of the hat. The moveable meter arrow on the front is made of hard plastic. McDrunk O'Meter Hat measures 5in x 10in. One size fits most.