In volleyball, taller women have a tactical advantage to shorter women in non-libero positions. Transgender women have been accused of having an 'unfair advantage' in sports, but height advantage typically isn't considered unfair between cis women.

Compared to trans women of equal skill level, how much taller does a cis woman have to be in order to be equally effective in the field?

This question resolves N/A if no credible research is known to me by market close. Otherwise it resolves to the scientific consensus, or my own judgment based on credible scientific evidence if no consensus exists. I will leave a definition/test of "equal skill level" and "equal field effectiveness" to the researchers. I'll resolve early if the consensus appears settled through positive evidence.

This question excludes liberos and trans women who have been under the influence of testosterone above levels normal for cis women in the two years before the study they are a part of.

If there is a subset of trans women defined by a specific treatment regime that meet the above criteria (e.g. those who did/didn't have puberty blockers), then this question resolves to the subset with the greatest advantage over cis women.

edit: If different skill levels have a different level of advantage, I will resolve to the highest skill level for which there is credible data.

I will not bet on this market.

NB: the different average height of cis women and trans women is excluded from this question's usage of 'the advantage of being transgender'.