Bertha is a term used to describe a large COLLAR, usually made of fur or velvet, that was popular in the late 19th and early 20th centuries. It was worn by both men and women as a fashion statement and was often seen in formal wear. The COLLAR was typically wide and had a high neckline, with a long, pointed shape. It was often decorated with lace, embroidery, or other embellishments. Bertha collars were also known for their warmth and comfort, making them a popular choice for winter wear.