The transverse area $S_{\rm T}$ as calculated in a numerical Glauber model for two extreme cases: a) only the exclusive overlap of nucleons is considered (${\cap}$, open markers) and b) the inclusive area of participating nucleons contribute (${\cup}$, closed markers) in both p$-$Pb and Pb$-$Pb at $\sqrt{s_{\rm NN}}$ = 5.02 TeV.