This is not a kitten next to an adult cat, or some sort of weird perspective trick to play with your head. This is a Maine Coon cat laying next to a normal house cat.
The Maine Coon cat is the largest breed of a domesticated cat, with a well-developed, muscular body. It can reach lengths of 1 meter from nose to tail tip, and weigh up to 18 pounds (It’s also the official state cat of Maine, in case you were wondering.). Try keeping up with the amount of tuna this guy would need!