Actually there is no set number of limit on the number of members anymore.
Team A and K currently have 22 while B has 23 with members rotating for stage performances. (16 per performance)
The popular theory (and I agree) is that each team will eventually have 24 per team which was the original blueprint when the groups started. (Original plan was 2 teams of 24, but that changed midway when they recruited 3rd gen members and became 3x16 and eventually 4x16)
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