Chef's knives range in size from 15cm to 30cm (6” to 12”), with 20cm (8”) being the most common size. Utility knife: A versatile knife for everyday tasks, though not quite as versatile as the chef's knife given its shorter length.
How long is a knife supposed to be?
Size for folding knives Average total length Average blade length
----------------------- -------------------- --------------------
Table knife 23,30 cm 12 cm
Table fork 21,50 cm 12 cm
Table soup spoon 22,30 cm 12 cm
Dessert-cheese knife 19,50 cm 11 cm