Melt the wax flakes. I did this in a homemade double boiler on the stove. By homemade I mean I just stuck one pot on top of another. If you have an actual double boiler feel free to use that.
To make the three smallish candles I made, I used about 3.5 cups of wax flakes. Luckily the wax flakes melt super quickly, so if you haven’t melted down enough to fill your candles, just melt some more.