Users can set the aspect ratio for the X, Y, Z axes of a 3D plot to be 'equal', 'equalxy', 'equalxz', or 'equalyz' rather than the default of 'auto'.
.. plot:: :include-source: true import matplotlib.pyplot as plt import numpy as np from itertools import combinations, product aspects = ('auto', 'equal', 'equalxy', 'equalyz', 'equalxz') fig, axs = plt.subplots(1, len(aspects), subplot_kw={'projection': '3d'}) # Draw rectangular cuboid with side lengths [1, 1, 5] r = [0, 1] scale = np.array([1, 1, 5]) pts = combinations(np.array(list(product(r, r, r))), 2) for start, end in pts: if np.sum(np.abs(start - end)) == r[1] - r[0]: for ax in axs: ax.plot3D(*zip(start*scale, end*scale), color='C0') # Set the aspect ratios for i, ax in enumerate(axs): ax.set_box_aspect((3, 4, 5)) ax.set_aspect(aspects[i]) ax.set_title(f"set_aspect('{aspects[i]}')") fig.set_size_inches(13, 3) plt.show()