Mr. Big is the largest sized candy bar produced by Cadbury, hence the name. The standard bar is made of a long, layered vanilla wafer, coated in caramel, peanuts and rice crisps, which is then covered in the simulated chocolate coating. A Mr. Big bar is the length of two "standard"-sized bars end-to-end – around 20 centimetres long.

In Canada

Canada

Canada is a North American country consisting of ten provinces and three territories. Located in the northern part of the continent, it extends from the Atlantic Ocean in the east to the Pacific Ocean in the west, and northward into the Arctic Ocean...

, they are very common, and are available at all regular retailers, in an increasing number of varieties. Some of the new varieties available include Mr. Chew Big (with added caramel

Caramel

Caramel is a beige to dark-brown confection made by heating any of a variety of sugars. It is used as a flavoring in puddings and desserts, as a filling in bonbons, and as a topping for ice cream, custard and coffee....

), Mr. Big Fudge (with a fudgy

Fudge

Fudge is a type of Western confectionery which is usually very sweet, and extremely rich. It is made by mixing sugar, butter, and milk and heating it to the soft-ball stage at , and then beating the mixture while it cools so that it acquires a smooth, creamy consistency...

 centre), and Mr. Big with Maple

Maple syrup

Maple syrup is a syrup usually made from the xylem sap of sugar maple, red maple, or black maple trees, although it can also be made from other maple species such as the bigleaf maple. In cold climates, these trees store starch in their trunks and roots before the winter; the starch is then...

. They are also available in lesser quantities in a few other countries like Australia

Australia

Australia , officially the Commonwealth of Australia, is a country in the Southern Hemisphere comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands in the Indian and Pacific Oceans. It is the world's sixth-largest country by total area...

 (though they are only available at the Cadbury factory outlet in Hobart

Hobart

Hobart is the state capital and most populous city of the Australian island state of Tasmania. Founded in 1804 as a penal colony,Hobart is Australia's second oldest capital city after Sydney. In 2009, the city had a greater area population of approximately 212,019. A resident of Hobart is known as...

, Tasmania

Tasmania

Tasmania is an Australian island and state. It is south of the continent, separated by Bass Strait. The state includes the island of Tasmania—the 26th largest island in the world—and the surrounding islands. The state has a population of 507,626 , of whom almost half reside in the greater Hobart...

), Great Britain

Great Britain

Great Britain or Britain is an island situated to the northwest of Continental Europe. It is the ninth largest island in the world, and the largest European island, as well as the largest of the British Isles...

, Germany

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

, Hungary

Hungary

Hungary , officially the Republic of Hungary , is a landlocked country in Central Europe. It is situated in the Carpathian Basin and is bordered by Slovakia to the north, Ukraine and Romania to the east, Serbia and Croatia to the south, Slovenia to the southwest and Austria to the west. The...

, and in some areas of the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. Mr. Big has also been commonly offered at convenience stores in South Korea

South Korea

The Republic of Korea , , is a sovereign state in East Asia, located on the southern portion of the Korean Peninsula. It is neighbored by the People's Republic of China to the west, Japan to the east, North Korea to the north, and the East China Sea and Republic of China to the south...

 such as Family Mart and 7-11 since the late 1990s.

Mr. Big is the only Cadbury chocolate bar to have an ice cream variant made by Nestlé

Nestlé

Nestlé S.A. is the world's largest food and nutrition company. Founded and headquartered in Vevey, Switzerland, Nestlé originated in a 1905 merger of the Anglo-Swiss Milk Company, established in 1867 by brothers George Page and Charles Page, and Farine Lactée Henri Nestlé, founded in 1866 by Henri...

. It was discontinued in May 2002 in the UK, due to poor sales. An ice cream bar version produced by Nestlé is still available in Canada, although other Cadbury ice cream products are made by Breyers

Breyers

Breyers is a brand of frozen dessert and ice cream owned by Unilever . They have a large plant in the town of Framingham, Massachusetts, outside Boston....

.

As an interesting footnote, the Mr. Big Brand name was originally owned by Nestlé and licensed by William Neilson (now Cadbury). This created the uncomfortable situation where the trademark of one of Neilson's largest brands was owned by its largest competitor. A deal was finally arranged with Nestlé where Neilson bought the rights to the name Mr. Big for confectionary.