i found this pattern was fairly hard to read when the two colors were very similar! i reccomend using one very dark and one very light color to make this the most readable. (but maybe you think the subtlety is cute- up to you!)
i also noticed that i had to add a lot of diagonals to the bottom to make it fit my arm (but i do knot pretty tightly). if you want it more centered, try to add a few more diagonals before the pattern starts!
KrazyKnotz
