The CAT 320 (CAT 320F L) Hydraulic Excavator model measures 4" long from the from the back of the vehicle to the front of the tracks. From track to track, the width is 2".
The upper side of the vehicle (the cab) can rotate 360 degrees. The articulations in the arm can move. Both arm links can move. The scoop also has movement. As you move each articulation the pins (pistons/cylinders) also move accordingly just like on the real thing.
THIS IS NOT A TOY. It is very small and fragile. It is made mainly for display purposes. This model comes in an individual window box.