If structures places data to stack why we do not getting stackoverflow on array of structures?

[Suliman via Digitalmars-d-learn]

> MyStruct[] is actually a struct similar to this:
>
> struct MyStruct[] {
>     MyStruct* ptr;
>     size_t length;
> }
>
> That struct is placed on the stack, but the data it points to, 
> via the ptr field, is heap allocated.

What is struct? Just name and size?