Mass-size relation of red-sequence early-type cluster galaxies at z< 1. From top to bottom: RXJ0152.7-1357 (z = 0.84), MACSJ1149.5+2223 (z = 0.544), MACSJ1206.2-0847 (z = 0.44), Abell 2744 (z = 0.31), and Abell 2218 (z = 0.17). The relation for Coma is shown in the bottom panel of Fig. 10. Sizes are corrected for PSF blurring effects, but the correction is so small that it cannot be seen for these clusters. Points with black contours are spectroscopically confirmed galaxies. The red solid line and yellow shading show the fitted mass-size relation and its 68% uncertainty (posterior highest density interval). The wedge between the two slanted lines is the locus of Coma galaxies. The horizontal dotted line indicates the PSF FWHM (for Abell 2744 and Abell 2217 it is smaller than the displayed r_e range).