Universal strangeness production and size fluctuactions in small and large systems

Strangeness production in high multiplicity events gives indications on the transverse size fluctuactions in nucleus-nucleus (AA), proton-nucleus (pA) and proton-proton (pp) collisions. In particular the behavior of strange particle hadronization in "small" (pp, pA) and "large" (AA) initial configurations of the collision can be tested for the specific particle species, for different centralities and for large fluctuations of the transverse size in pA and pp by using the recent ALICE data. A universality of strange hadron production emerges by introducing a dynamical variable proportional to the initial parton density in the transverse plane.