Crinkle Cutter for jumbo melts. 
This large cutter makes it easy to cut bigger melts in smaller wax pieces. The cutter is about 10 cm wide, sits nicely in the hand and slides easily through soy wax. Paraffin is a bit more brittle, but works as well.
Be careful, the blade is very sharp.
You can also use it for cutting potatoes or other vegetables or fruit. Please keep the cutter for either way or food, don't mix.