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.
Also be aware that the portions on the label, and the amount often enjoyed at a meal, are larger than the 1/2-cup serving recommended by the U.S. Department of Agriculture. Expect 1/2 cup of cooked pasta to have 18 to 22 grams of total carbohydrates, depending on the brand and ingredients. For example, 1/2 cup of whole-wheat spaghetti has 19 grams, while the same portion of plain spaghetti has 22 grams. The nutrition panel reports the amount of total carbohydrates, sugar and fiber.