Upper panels: comparisons of effective radii for UCD candidates obtained by Jennings et al. (2014) and VEGAS-SSS results. Upper left panel: comparison between VEGAS-SSS and ACS sizes from Jennings et al. (2014). Upper right panel: comparison between the R_h from VEGAS-SSS, and measurements with 2Dphot. Lower panel: photometric comparison for the same UCDs in upper panels. VEGAS-SSS photometry is taken as reference. The difference with respect to ACS data from Jennings et al. (2014), magnitudes derived with Ishape, and magnitudes from 2Dphot are shown with black circles, green triangles, and blue empty squares. In all panels symbols size are scaled to the R_h from Jennings et al. (2014).