St. Patrick's Green Tam Hat These awesome green and white Irish Tam O Shanter hats are the perfect accessory for St. Patricks Day, all things Irish, and a great throw-back to vintage 1980s golfer fashion! Woven green acrylic material complete with a white toorie (pom-pom) is built to last, and adult standard size is approx 21-22" circumference to fit most. Great on their own and even better with the costumes and accessories available in our store! Enjoy!