  Diffusion Monte Carlo calculations on the possibility of having self-bound
one-dimen\-sional droplets of SU(6) $\times$ SU(2) ultracold fermionic mixtures
are presented. We found that, even though arrangements with attractive
interactions with only two spin types are not self-bound, mixtures with at
least three kinds of fermions form stable small drops. However, that
stabilization decreases for very tight confinements, where a universal behavior
is found for Fermi-Fermi and Fermi-Boson clusters including attractive and
repulsive interactions.
