What is engine block size of 5.7 hemi?

The engine block size of a 5.7L Hemi isn't typically described by a single "size" like cubic inches or liters in the way the displacement is. While the displacement is 5.7 liters (or approximately 345 cubic inches), that refers to the total volume of all cylinders.

The physical dimensions of the engine block itself (length, width, height) vary slightly depending on the specific application (truck, car, etc.) and year of manufacture. There's no single definitive answer for the "block size" without specifying the exact model and year of the vehicle.