galaxies
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The size–mass relation {#sec:sizemass}
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In Figure \[fig:size-mass\] we compare the size versus stellar-mass relation for galaxies in the redshift range $1<z<2$. Individual galaxies are shown, along with mean values as a function of stellar mass (in bins of 0.25 dex). In the upper panels we show the results from the ground-based $K$-band imaging, while the lower panels are based on independent sizes from CANDELS $H$-band imaging (covering $\sim$9% of the sample). The 95% mass completeness limits are shown (see Section \[sec:masses\]), determined at $z=2$ to provide conservative limits. In determining mean values for the ground-based sample we applied a 5$\sigma$ clip (with one iteration), to remove extreme outliers, but removing this constraint has no significant influence.

Representative error bounds for individual galaxies are shown on the left panels, based on the median errors on the PSB sample. For the CANDELS sizes, data are taken from van der Wel et al. (2012), which include estimates for random and systematic errors from GALFIT. For the ground-based individual errors, we add in quadrature the scatter in $\delta R/R$ determined by the comparison with CANDELS (Section \[sec:sizesersic\]). The representative uncertainty on stellar masses is based on our Bayesian mass-fitting analysis described 