Toogie When I made mine I used a 6 1/4inch block and made twelve blocks using a 1/4 inch seam. I am sure you will cope even with a 6 inch block if you go to Google and put in origami candle mat you will see a You Tube video which is very informative happy sewing
Thanks Carol, Sue has answered my pm,too. I didn't know how big the hole for the candle measured, but I knew if you used a 6 or 61/4 block, it would be at least 12 across, not counting the hole,right?