Kippenhahn diagrams similar to Fig. 5 but for models with masses of 1331, 1662, 1923, 4477, and 6127 M_⊙. The radii of these models is larger than that of the low-mass models. The models depicted here transition to the red and expand their radius before completion of the core hydrogen burning phase. Model 4477 M_⊙ shows an exceptional behaviour as it undergoes an expansion in radius during hydrogen burning. This is due to a burst of accretion experienced by this model.