import matplotlib.pyplot as plt
plt.figure(figsize=(14,7))
plt.bar(x,y)
# if you have plotted you graph directly using dataframe like this ↓
data.plot(kind='bar')
# then use this
plt.rcParams["figure.figsize"] = (14,7)
import matplotlib.pyplot as plt
plt.rcParams["figure.figsize"] = (20,3)
from matplotlib.pyplot import figure
figure(num=None, figsize=(8, 6), dpi=80, facecolor='w', edgecolor='k')
fig_width, fig_height = plt.gcf().get_size_inches()
print(fig_width, fig_height)