Distribution of axis ratios for the full sample of dEs. The median axis ratio of the sample is q = 0.72. The vertical dashed lines mark the 45th and 55th percentiles of the distribution, which define the boundaries used to classify galaxies by shape. dEs with q  <  0.70 are defined as flat, while those with q  >  0.74 are defined as round. The intermediate axis ratios between these percentiles are excluded to avoid ambiguous classifications and to ensure a clean separation between flattened and round systems.