We show that experiment and simulation, upon appropriate parameterization of the latter, can exhibit quantitative matching. This matching relies on experimental data that is sufficiently sensitive to reflect differences in the synthesized bottlebrush structure, for which we primarily use intrinsic viscosity. We interpret this data in the context of both conceptual arguments as well as the corresponding simulation, which provides a direct glimpse at molecular conformations adapted by these bottlebrush molecules. This provides a direct characterization of molecular shape and size, showing that an increase in backbone length results in a change from a star-like structure to a short cylinder, and finally to a flexible cylinder.