plt.rcparams 'figure.figsize' code example
Example 1: plt figsize
plt.figure(figsize=(20,10))
Example 2: matplotlib set size
plt.figure(figsize=(20,8))
Example 3: change plot size matplotlib
from matplotlib.pyplot import figure
figure(num=None, figsize=(8, 6), dpi=80, facecolor='w', edgecolor='k')