Stellar mass-size relation for high-z nuggets (black points, from Szomoru et al. 2012), the F17 local relics (yellow triangles), and the relic candidates targeted by INSPIRE (green points and magenta diamonds), compared to the relation for normal SDSS ETGs (grey line, from Shen et al. 2003). By selection, all UCMGs are clear outliers of the local stellar mass-size relation, and high- and low-z systems lie on the same region of the diagram.