  A model combining vector meson dominance, $\omega - \phi$ mixing and a kaon
cloud contribution is used to estimate the strangeness vector form factors of
the nucleon in the momentum range of the planned measurements at MIT-Bates and
CEBAF. We compare our results with some other theoretical estimates and discuss
the nucleon strangeness radius in models based on dynamically dressed, extended
constituent quarks. For a quantitative estimate in the latter framework we use
the Nambu-Jona-Lasinio model.
