Cadbury's Mr Big got its name from its size, it really is BIG! The largest of the regular candy bars produced by Cadbury's in Canada, Mr Big is a super-long vanilla flavoured layered wafer coated in peanuts, rice crisps, caramel, and finally lashings of milk chocolate. It is a serious snack time hunger buster! Just when you thought Mr Big couldn't get any bigger, they did just that! King sized Mr Big Cadbury's bar.