  We study the low temperature magneto-transport properties of several highly
disordered amorphous Indium oxide(a:InO) samples. Simultaneously fabricated
devices comprising a 2-dimensional (2D) film and 10 $\mu$m long wires of
different widths were measured to investigate the effect of size as we approach
the 1D limit, which is around 4 times the correlation length, and happens to be
around 100 nm for a:InO. The film and the wires showed magnetic field ({\it B})
induced superconductor to insulator transition (SIT). In the superconducting
side, the resistance increased with decrease in wire width, whereas, an
opposite trend is observed in the insulating side. We find that this effect can
be explained in light of charge-vortex duality picture of the SIT. Resistance
of the 2D film follows an activated behavior over the temperature ($T$),
whereas, the wires show a crossover from the high-$T$ activated to a
$T$-independent behavior. At high temperature regime the wires' resistance
follow the film's until they deviate and became independent of $T$. We find
that temperature at which this deviation occurs evolve with magnetic field and
the width of the wire, which show the effect of finite size on the transport.

Mesoscale and Nanoscale Physics;Superconductivity