There‘s no “sample” design. It depends on components, interconnects, etc. Any “sample” would be irrelevant to a specific design. There are design parameters that define impedance, etc. There’s no single design; you can have a thin dielectric between layers with narrow traces, or thick dielectric with wide traces giving the same impedance (I might have that backwards, but you get the point).
you might also want to invest in some analysis tool like Hyperlynx that will give you the answers you’re looking for.