  We measure the sizes of 82 massive (M>10^11 M_sun) galaxies at 1.7<z<3
utilizing deep HST NICMOS data taken in the GOODS North and South fields. Our
sample is almost an order of magnitude larger than previous studies at these
redshifts, providing the first statistical study of massive galaxy sizes at
z>2, confirming the extreme compactness of these galaxies. We split our sample
into disk-like (n<2) and spheroid-like (n>2) galaxies based on their Sersic
indices, and find that at a given stellar mass disk-like galaxies at z~2.3 are
a factor of 2.6+/-0.3 smaller than present day equal mass systems, and
spheroid-like galaxies at the same redshifts are 4.3+/-0.7 smaller than
comparatively massive elliptical galaxies today. At z>2 our results are
compatible with both a leveling off, or a mild evolution in size. Furthermore,
the high density (~2x10^10 M_sun kpc^-3) of massive galaxies at these
redshifts, which are similar to present day globular clusters, possibly makes
any further evolution in sizes beyond z=3 unlikely.
