Utility knife. pixnio.com / Public Domain
A utility knife, in culinary terms, is a larger version of a paring knife.
It is mid-way in size between a paring knife and a chef’s knife, about 10 to 15 cm (4 to 6 inches) long, and narrow.
The blade can be flat-edged or serrated.
The knife is useful for slicing and deboning.