Irish Flat Cap 100% Wool Brown Herringbone Made in Ireland Irish flat cap made from 100% wool and lined with 100% polyester for comfort. Cap has brown plaid design with subtle hints of red and blue and a herringbone detail. Small (7) = 22 , Medium (7 ) = 23 , Large (7 ) = 24, and XL (8) = 25 . Made by Mucros Weavers in Co. Kerry, Ireland.