. . .Yes there really is such a thing as a Liger.

A liger  is a cross between a male lion and a female tiger. 
The hybridization makes him the size of both his parents put together.
At more than 900 lbs. the liger is the world's biggest cat.
Below you can see a photo of Hercules our liger in the Guiness Book of World Records.

Liger Claws

This is a cast of a liger claw.