How to increase the font size of the legend in my Seaborn plot using Matplotlib?

To increase the font size of the legend in a Seaborn plot, we can use the fontsize variable and can use it in legend() method argument.

Steps

Create a data frame using Pandas. The keys are number, count, and select.
Plot a bar in Seaborn using barplot() method.
Initialize a variable fontsize to increase the fontsize of the legend.
Use legend() method to place legend on the figure with fontsize in the argument.
To display the figure, use show() method.

Example

import pandas
import matplotlib.pylab as plt
import seaborn as sns
plt.rcParams["figure.figsize"] = [7.00, 3.50]
plt.rcParams["figure.autolayout"] = True
df = pandas.DataFrame(dict(
   number=[2, 5, 1, 6, 3],
   count=[56, 21, 34, 36, 12],
   select=[29, 13, 17, 21, 8]
))
bar_plot1 = sns.barplot(x='number', y='count', data=df, label="count", color="red")
bar_plot2 = sns.barplot(x='number', y='select', data=df, label="select", color="green")
fontsize = 20
plt.legend(loc="upper right", frameon=True, fontsize=fontsize)
plt.show()