Silicon mould - candle160 X 130mm diameter (AT ITS WIDEST POINTS) by 130mm tall.
Try small wick 48 ply with a workable burn diameter of 90mm.
We suggest that the wick is angled so the burn tracks through the thickest part of the candle.
The photo shows the skull poured in icicles palm wax with some black dye.
Approx 1.2kg candle
You may like to add Wicking needles.