I have already set mouse acceleration to 'zero' and Sensitivity to maximum (High) but it is still moving too fast for my liking.
I have found the following solution:
xinput --list --short
xinput --list-props 19
xinput --set-prop 19 151 1.0 0.0 0.0 0.0 1.0 0.0 0.0 0.0 2.5
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