Stellar half-mass radius R_e versus stellar mass M_* for massive galaxies at z = 2 in EH and SH. The displayed model from Dutton et al. (2011) provides a good fit to SFGs at z = 2. UC galaxies lie below the black dashed line while NUC galaxies are above. We identify EH galaxies above and below the Main Sequence of star formation (MS) with stars and triangles, respectively, following the definition of the MS from Schreiber et al. (2017).