* Smilodon fatalis: This is the most well-known species, and its skull could be up to 18 inches long.
* Other species: Smaller species of saber-toothed cats, like Homotherium, had proportionally shorter skulls, while larger species like Smilodon populator had even longer ones.
Important notes:
* The canines (the saber teeth) were the most prominent feature of the skull. They could be over 7 inches long in some species.
* The skull was robust and massive, reflecting the powerful bite force of these animals.
* The lower jaw was also designed to accommodate the long canines, with a distinctive hinge that allowed for a wide gape.
To get a more specific measurement, you would need to know the exact species of saber-toothed tiger you are interested in.