The candy foil size depends on your chocolate. Chocolate bonbon, chocolate bar, and chocolate praline all are in the same calculation method. You could see the following picture.
For example, chocolate bar length is 12cm,width is 7cm,hight is 0.8cm.
The foil wrapper minimum length will be 2 x 7 cm + 2 x 0.8cm=15.6cm
Minmun width will be 12cm + 2 x 0.8cm =13.6cm
So the foil wrapper size should be bigger than 15.6cm x 13.6cm.
Also, there has an easy way to know the suitable foil wrapper size. You could try to wrap your chocolate use paper. This way is more convenient if the chocolate in your hand.
Contact us if you want to custom your size foil wrapper.