The trial and error part came mostly in the string I used. First I bought a hemp twine, which actually worked just fine, but it lacked the softness of the more yarn like string, so I went back to find something different.
What you will need:
1. String: This was hard to find, but in the jewlery section they had friendship bracelet string by Prism. I used the "Sweet Sucreries Dulces"package, from Michaels.
2. Wire: I used Beadalon German Style Wire, 24 Gauge, from Michaels. Anthropologie used rope, but I couldn't find one I liked, that was thin enough to fit through the rings. Upon further review a thicker gauge wire would have been better.
3. Charms: I looked around for charms with rings on both sides and found Making Memories, Vintage Groove III, from Michaels.
4. Needle Nose Pliers.
6. I added super glue to help hold the knots.
Step 1: If the charms you got have too many rings on them, take the outside ones off with needle nose pliers.
Step 2: Take your wire and measure it out around your wrist. Once all the way around should be good for one side (error on the side of too long). Cut the wire with scissors or your pliers, and fold it in half. Then do the same for the other side.
Step 3: If your ring is facing up, twist your wire so that it is facing the right way to show the braid. If your ring is facing sideways, your wire should be just fine, but if you want to twist it all the way around to help keep it in place, that is fine too.
Step 4: Take your string and cut off a piece about the length from one hand across your body to the other hand, and fold it in half twice. You should have 4 strands to braid with. (I did the first one with two strands and then wanted it thicker.) *Try to keep the strands as flat as you can, so that they take up more space...it looks cleaner.
Step 5: Weave the 4 strands of string through the ring, so that they lay on either side of the wire. Then braid them down the wire like a fish tale braid. Strand A goes over the left side and under the right side. Strand B goes over the right side and under the left side. Then Strand B goes over the left side and under the right side. Strand A goes over the right side and under the left. Just keep saying "over, under, over, under" until you get it.
Step 6: When you get to where you want to stop, tie a knot on one side, and then flip it over and make the remaining wire into the loop. Then tie that side over the end of the wires, so they don't pop out, or scratch you.
Step 7: Super Glue over both knots and let that side dry while you take on the next side.
Step 8: When you get to where you want to stop on the second side, fold the remaining wire into a hook, and then use the pliers again to pinch the wire back to make a fold. Keep folding the wire back on it's self until it is flush with the braid and tie that side over the exposed wire...glue and you're done!