* "Size" is ambiguous: Size can refer to displacement (cubic inches or liters), bore and stroke dimensions, or even overall physical dimensions.
* Variations within a family: Chevrolet has produced many variations of V8 engines, even within the same basic "family" (like the small-block or big-block). These variations might have slightly different displacements due to different bore and stroke combinations.
* Overlapping generations: Engine families have overlapped throughout history, with some sizes persisting across multiple generations with significant internal differences.
To get a sense of the sheer number of *different displacements* offered over Chevrolet's history, you'd be looking at dozens, if not more, depending on how you categorize them. There were many different iterations, including various versions with different features, modifications, and even different names despite sharing similar displacement.
