Continue to twist the wires until they are secure and slide down until it is the correct size, or just a little larger since you need to wrap the band when you are finished. You may need to use a mallet to get the ring to the correct size. This will "lock" the wire in place and make the ring more secure.

Make a spiral in the end of one of the wires and place it near the band on the ring. Skip two wires and make another spiral, repeat until you reach the starting spiral.

Now repeat the spiral pattern, skipping one wire between spirals, and then finishing the spiral on all of the wires. Make sure to space the wires, stacking them up as you go, creating a dome on the top of the band. Check your spirals often to make sure you are getting them evenly spaced and filling in spaces as you go. You should end with one spiral at the top of the dome.

Place your ring back on the mandrel and check your size again. Take the half-round or round wire and start at the center of the wire and center of the band, wrapping as you go out to each side. You don't need to completely wrap the band, just enough to hold the wire together and size the ring, about an inch and a half in total.

Place your ring back on the mandrel and tap with a mallet if necessary to get to the correct size. Now take a good look at the spirals on top of the ring and adjust so they are even and there are no empty spots.

On the silver ring in the picture, I have all of the spirals flat and used a rubber mallet to flatten them against each other. The copper ring has the spirals up off the ring which gives it a little more dimension and a higher profile. The gold ring is how yours will look just after you finish it; no hammering or raising the spirals off the ring.