@Chocomonda I did around 75 rows in total including the pattern, around 20 rows before and after the pattern.
As for knowing how many rows i needed to do, i used a bit of math 🙈 I estimated how long each background row was by knotting a few rows then diving their total length by the number of rows. So if I did 6 rows and it was 1.3cm long altogether, I'd divide 1.3 by 6 and get the length of one row, mine were 0.21cm each row. Then I found out the pattern itself was around 7.4cm long for me because it's 34 rows long (0.21 x 34). You can just figure out the length of the other two background sides by subtracting 7.4 from how long you want your bracelet to be, then dividing it by two.
Does that make sense? If it's still not clear feel free to ask away XD Of course this is only if you want to be really particular with your lengths, I'm pretty sure you can just estimate and it will turn out just as good! 😉 😊 😜