Combinations of the mass and initial semi-major axis of TWA 7 c within the observational limits that successfully reproduce the inner edge of the disk at 23 au. For several values of m_c, the corresponding acceptable ranges of a_c are shown in green. These ranges reflect the width of the inner edge of the disk as defined in Sect. 3.2. A power-law fit is overlaid in blue, accounting for the extent of each semi-majoraxis range. Shaded areas correspond to regions that are not dynamically accessible to TWA 7 c.