This is an informational guide for collectors of Jay Dolls. Jay of Dublin was the company in Dublin who manufactured these dolls in mid-1900's. Though little is known about the company, Jay's Irish character dolls remain popular. Besides the realistic facial features of the dolls, the costumes represent traditional Irish country clothing before the Potato Famine radically changed Irish culture. This guide provides a summary of the history of Irish clothing in the 19th century. There are many color pictures of the dolls and their costumes. Each costume is examined within the cultural environment it represented. Details about the parts of the clothing, Irish terms, and background of each doll is explored. The dolls exemplify the clothing worn by Irish men and women in various regions of Ireland.