@magicknot4 I think that you would need to cute the "B" string (the purple string) the longest. I would cut some of the "A" strings (the white string) longer unless you are ok with replacing strings which "Masha Knots" and "kinsey b" have tutorials on their YouTube channels. Here are the video titles: Masha Knots: FIXING BRACELET MISTAKES [CC] || Friendship Bracelets kinsey b: how to add more string to started bracelets!
If you'd like me to give you the links let me know! For the rest of the strings, I would cut them a wingspans length (From one finger tip, to the opposite finger tip on the other arm) if you were doing a loop. If you aren't doing a loop, I would do have of your wingspan (from your finger tips to the middle of your chest)! That was a long explanation, but I hope this helps! 😇 Let me know if you have anymore questions! 😄