mr. big is the largest sized candy bar produced by cadbury in canada, hence the name. the standard bar is made of a layered vanilla wafer coated in caramel, peanuts, and rice crisps and covered in a chocolate coating. the bar is the length of two "standard"-sized bars – around 20 centimeters (8 inches) long. additional varieties include mr. chew big, mr. big fudge, and mr. big with maple.