The smallest unit of measurement is 1/16 of an inch. When you look at a ruler and count all the lines between the 1 inch and 2 inch marks you will see that there are 16 lines all together.
A single serving of pasta is generally regarded as 2 oz. (57 g) of cooked pasta for a first course or side dish. A serving can be raised 3 to 4 oz. (85 to 113 g) if it is the only course. Occasionally a serving is approximated as 1/2 cup (114 g) of pasta; however, this depends upon the shape of the pasta.
The recommended size of pasta per person is 75 grams for dried pasta, and 130 grams if the pasta is fresh. For pasta with fillings, 175-200 grams per person is recommended.