This works https://www.youtube.com/watch?v=hepyuMzNFfc&t=152s

"You edit the battle size by going to /Documents/Mount&Blade Warband/rgl_config.txt then press ctrl + f and search "Battle" to find "battle_size = ", where you can input one of the above values, or your own:

(First number is what to put in the txt file, second number is the battle size that it will change it to)

8.0833 = 1000
7.6610 = 950
7.2448 = 900
6.8305 = 850
6.4143 = 800
6.0000 = 750
5.5753 = 700
5.1591 = 650
4.7448 = 600
4.3286 = 550
3.9143 = 500
3.5000 = 450
3.0805 = 400
2.6643 = 350
2.2500 = 300
1.8305 = 250
1.4143 = 200
1.0000 = 150

So for example, in my rgl_config.txt file, the battle_size line reads "battle_size = 3.0805"

or you could go the easy way and download the battle sizer

The battle sizer does not work though. The mod overrides it, though I may need to double check that.

thank u all for the help