What is fun size meaning?

The term "fun size" is often used to describe smaller portions of popular candy and snack items. For example, mini Snickers bars or small bags of chips may be advertised as "fun size." The term implies that these smaller portions are a fun and enjoyable way to enjoy these treats without overindulging. "Fun size" can also be used more generally to describe anything that is small and playful, such as a toy or a mini version of a popular product.