Lay your pearl collection out and decide the shape you want it to have. I chose to leave the necklace as is, instead of re-stringing it, and have the big pearls on one side.
Attach the loop connectors to each end (I got them at the bead store). Use waxed lined if you can. The wax make a true slip proof knot.
Tie the ribbon through the loops and adjust to your desired length. I made mine big enough to slip over my head, but you could also leave it open at the back and tie the ribbon on when you wear it.
Add a bow on one side to make it extra special! And Ta-Dah! You have a J.Crew-ish pearl necklace!