Distributions of the relative error between the size of the galaxy measured from the SAM truncation (denoted as R_0.5) and the semimajor axis of the truncation ellipse in BT24 (denoted as R_edge). The solid black histogram corresponds to the whole sample of 1047 galaxies, while the dashed red histogram shows the distribution for 774 galaxies with ΔR_0.5 ≲ 0.17 (i.e., excluding those within the Q5 quintile) and b/a > 0.25. The median and IQR of the relative error between the two estimates for both distributions are also shown.