Save one bead for your "clasp". Thread both sets of ribbon through this last bead. Measure the length of the necklace before tying the final knots. This is where you can adjust the length of the necklace. It is better to have the ribbon to long, and to cut of the excess in this step rather than getting to this point and not having a long enough necklace.
I apologize for the teal backdrop with the light lime ribbon. I had originally intended to use black ribbon, but did not have any in the small ribbon width. The black ribbon I did have on hand was just way to wide to use with these beads.
Here is a picture of how lovely the black, teal, and pink looked together. Ahhh.