I've used RRD's in my pillars before and they do wonderful. RRD40 is WAY too big for a votive. I would suggest a RRD 29 to start. FYI: Here's some size recommendations for the RRD's wRRD29 Small Candles, approx. 2 - 2.25" wRRD34 Small Containers, approx. 2.25 - 2.5" wRRD37 Medium Containers, approx. 2.5 - 3" wRRD40 Medium Containers, approx. 3 - 3.25" wRRD47 Large Containers, approx. 3.5" wRRD50 Large Containers, approx. 3.75" wRRD55 Large Containers, approx. 4 - 4.5" edited to add: The pillars I used these wicks with was 1343. Since you are using soy which typically requires to wick up a size, I would say the dimensions suggested for the rrd29 might just work out. Give it a try, that's the onlyway you're going to know for sure. If you don't have any, let me know and i can send you a couple to test.