* Saber-toothed Cats (extinct): These cats, like Smilodon, are famous for their enormous canines, reaching lengths of up to 12 inches (30 cm). However, they are extinct, so they don't technically qualify for "biggest" in a contemporary sense.
* Tigers: Known for their impressive size, tigers have large canines that can reach up to 4 inches (10 cm) in length.
* Lions: Similar to tigers, lions also have large canines reaching lengths of up to 4 inches (10 cm).
* Jaguars: Jaguars have powerful jaws and large canines that can be around 3 inches (8 cm) long.
* Leopards: Leopards are known for their sharp, curved canines which can grow up to 3 inches (8 cm) long.
Important Note: "Longest teeth" can refer to different teeth types. The canines are usually the longest teeth, but some big cats might have longer incisors or premolars.
Overall, while the extinct saber-toothed cats had the longest canines, tigers and lions likely have the longest teeth among the currently living big cats.