@Msrtines the length of the base strings needs to be the length of the bracelet plus some extra for ties. Double the length if you do a loop. You can calculate how long 77 rows would be for you by measuring a certain amount of rows in an alpha you made previously.
@MrsWaltz Thank you so much! I used cheap string from a big color set, so I am not completely sure about the color number.. but I think number 3809 from dmc comes pretty close!