@tisakidis I would say around 130cm for colors D, E and F, around 110cm for colors A and C and around 90cm for color B (these are the approximate lengths for a 15cm bracelets with braided/twisted ties)
@s1mmxn3 there are basically two ways you can knot a normal pattern: row by row or in segments. I recommend watching a video on segment knotting or reading a tutorial in the tutorial section. It's a little difficult to explain how to segment knot a specific pattern if you're only using words. If you can't figure out how to segment knot this you can always knots row by row. To do that you just put the strings in the order you see on top and then make the knots row by row.