How to get bin size in hover template?

Example code:

df = px.data.tips()

fig = px.density_contour(df, x="total_bill", y="tip")
fig.update_traces(contours_coloring="fill", contours_showlabels = True)
fig.show()


How do I get the bin size in hover template, I am looking for something like "{xbin}, {ybin}" as hovertemplate

Thank you.