The candle mats I've made are all from felted wool. Do you have any on hand, or do you need to make them from cottons?
Here's a free pattern I found, I see it's over 11" but I just measured mine and they are 8" which I find a perfect size, so maybe you could scale this pattern down?
http://www.this-n-thatfabrics.com/ho...ndle%20mat.pdf
Or you could use this idea, but make a snowman face or tree instead of a heart?
http://www.lovetosew.com/countyheartcandlemat.htm