Williamson-Dickie Mfg. Co. has transformed itself from a small bib overall company to the largest workwear manufacturer in the world. Sold in every state in the U.S., Dickies now offers a broad spectrum of work garments ranging from work pants and work shirts to denim jeans and women’s workwear. Since its beginnings in 1922, every piece of Dickies workwear has stood for the quality, toughness, and pride that embodies the spirit of the American worker. Workwear: Pants, Shirts, Coveralls & Overalls, Outerwear.