Large collars, also known as Eton collars, are a type of high, stiff collar that was popular in the late 19th and early 20th centuries. They were typically worn with a bow tie and were often seen on formal occasions. The collars were usually made of starched cotton or linen and were designed to stand up around the neck. They were often decorated with lace or embroidery and were considered a fashionable accessory for men during this period.