I think 1/2" would be good also. Although I don't embed it in the candy, I use 1/2" on my candy boards and it works great at keeping the chunks from falling through the hive. It doesn't seem to hinder the bees any, and the only drawback I have had is when I left them on too long in the spring and they built wax in them, then it was a pain to clean out.
Although adding marginally more cost, I think the 1/2" cloth would work better than wiring. I'll have to give it a try if I make more frames.