  We study the eigenvector mass distribution of an $N\times N$ Wigner matrix on
a set of coordinates $I$ satisfying $| I | \ge c N$ for some constant $c >0$.
For eigenvectors corresponding to eigenvalues at the spectral edge, we show
that the sum of the mass on these coordinates converges to a Gaussian in the $N
\rightarrow \infty$ limit, after a suitable rescaling and centering. The proof
proceeds by a two moment matching argument. We directly compare edge
eigenvector observables of an arbitrary Wigner matrix to those of a Gaussian
matrix, which may be computed explicitly.
