Matplotlib scatter s and markersize, s = markersize**2

• Matplotlib markersize unit is point (from default matplotlib rcParams)
• for Matplotlib s see: https://matplotlib.org/stable/api/_as_gen/matplotlib.axes.Axes.scatter.html#matplotlib.axes.Axes.scatter

s: float or array-like, shape (n, ), optional

The marker size in points**2 (typographic points are 1/72 in.). Default is `rcParams['lines.markersize'] ** 2`.