  We have applied a new restoration technique to archival [O~I], H$\alpha$, and
continuum HST images of DG~Tau. The restored [O~I] and H$\alpha$ images show
that DG~Tau has a jet with a projected length of 25~AU and width $\leq$10~AU,
and is already collimated at a projected distance of $\sim$~40~AU (0\farcs25)
from the star. Such a narrow width and short collimation distance for a stellar
jet places important constraints on theoretical models of jet formation.
