Visual Reference: Here are the two rings side by side as an example of how a properly opened ring looks next to a-not-so-properly opened ring.
Now that you’ve seen how to open a ring, you close it the exact same way. Depending on the metal you are using, you may need to push the two ends of the ring a little past closed, so that when you relax your grip, they “spring back” to a nice even closure.
It’s as simple as that! Now you’re ready to tackle any chainmaille pattern, assured that your jump rings are closed securely.