Technically, you should take away cord length, but if you follow the exact same pattern with 3mm, you'll have a really small bag. You'd have to modify the pattern yourself using the same cord lengths and adding additional cords to make a longer/larger pattern
I did it with right length of the cords but the cords become too short so i couldn`t make the square knot at the bottom of the bag ! What do you think the problem is ?
