  Quantum states of a spin $1/2$ (a qubit) are parametrized by the space $CP^1
\sim S^2$, the Bloch sphere. A spin j (a 2j+1 -state system) for generic j is
represented instead by a point of a larger space, $CP^{2j}$. Here we study the
angular momentum/spin in the limit, $j \to \infty$. The state, $(J \cdot n) |
j, n\rangle = j |j, n \rangle $, where $J$ is the angular momentum operator and
$n$ stands for a generic unit vector in $R^3$, is found to behave as a
classical angular momentum, $ j n $. We discuss this phenomenon, by analysing
the Stern-Gerlach experiments, the angular-momentum composition rule, and the
rotation matrix. This problem arose from the consideration of a macroscopic
body under an inhomogeneous magnetic field. Our observations help to explain
how classical mechanics (with unique particle trajectories) emerges naturally
from quantum mechanics in this context, and at the same time, make the
widespread idea that large spins somehow become classical, a more precise one.
