that looks great, Roger. My patio consists of the 12" paver blocks...I used pressure treated 2x4s around the edge. They make plastic landscape edging that's pretty thin, and you can get it cheap at Home Depot / Lowes, etc. It stakes down.

Or....

You can just let the grass grow up to the edges...It's amazing how well that can shore up the edge. The downside is you'll probably get grass between the pavers.