  We have investigated the confinement of 3-D vortices in specific cases of
Type-II ($\kappa = 2$) nano-superconducting devices. The emergent pattern of
vortices greatly depends on the orientation of an applied magnetic field
(transverse or longitudinal), and the size of the devices (a few coherence
lengths $\xi$). Herein, cylindrical geometries are examined. The surface
barriers become very significant in these nano-systems, and hence the
characteristics of the vortices become highly sensitive to the shape of the
system and direction of an applied field. It is observed that nano-cylindrical
superconductors, depending on their sizes, can display either first or second
order phase transitions, under the influence of a longitudinal field. In the
confined geometries, nucleation of a giant vortex state composed of a n-quanta
emerges for the longitudinal magnetic field.
