What if you went outside the box and used flattened wire for your clasp? It would add dimension and a bit of extra to your design. Of course, you COULD purchase flat wire but it is super simple to get this look all on your own without buying extra.
There are a couple of ways to flatten wire, you can use a rolling mill (if you are so blessed) or a hammer and bench block
You will get the same look. You can decide just how flat you want it. I used 16 gauge copper wire.