The circle is just outlined with thin, flexible cotton twine. No it's not perfect but it's not supposed to be. It's simply a guide for me when I am casting in candlelight to know where my boundaries should be. It's also very temporary because I rent my flat and really don't want my real estate agents walking in on this when they do their 6 monthly inspections!
I've also added a closeup of my altar for anyone who might be interested. I don't usually have so much stuff on it but I thought I would make it look 'complete' for the photo. It was actually quite bare the other night when I performed my Samhain ritual. And yes I'm in Australia

Anyway, what do you guys do? Care to share any ideas you have or even photos of your setup?
BB,
Lucian (O)