Similar to Fig. 2: example radial profiles of cluster dwarf galaxies with M_⋆ ≲ 10⁸ M_⊙. The first panel is the gri-colour composite image using FDS images (Venhola et al. 2018), overlaid on a grey scale background to highlight the low surface brightness boundaries of these galaxies. White in this scale indicates non-detections or background pixels in the data. FDS names for each galaxy from Venhola et al. (2018), Su et al. (2021), the estimated stellar mass in units of log M_⋆/M_⊙ (left) and edge locations (dashed ellipses) are indicated in each panel. The second, third and fourth panels are the g (cyan) and r-band (orange) surface brightness, g − r and Σ_⋆ profiles respectively. The identified edge feature is indicated as a vertical dashed line. To highlight the inflection point we mark as the edge feature in the colour and stellar surface density profiles, we additional plot a least squares polynomial fit of degree four as a solid line in those panels. Galaxies are ordered by increasing stellar mass from the upper to lower panels.