Kippenhahn diagrams for 60, 20, 12, 7, and 3 M_⊙ (rows) stellar models at metallicity Z = 0.014. Odd columns show the full radius (in mass units), and even columns show the zoom into the outer 10% of the radius (in radius units). Hatched areas denote radiative zones. The Ledoux-unstable convective zones are mapped by colour based on convective velocity. The two left columns are plotted with the age in megayears, while the two right columns are plotted with the age in the model number, which allows for a better view of the short-lived post-MS stages.