There are 8 Ounces in a cup. Therefore the Tablespoon is 1/2 Ounce. A teaspoon is 1/3 of a tablespoon or 1/6 of an ounce. Remember this, 128 ounces in a gallon. 1/2 of a gallon is the next stop down = 64. 1/2 of that is a quart = 32 ounces. 1/2 of that is a pint = 16 ounces.
The difference between US Letter and Legal Paper sizes and international A4 is discussed here, however it is important to say that Letter is effectively the equivalent to A4 size in the USA.
Many legal documents, for example, have to be on legal-sized paper, which is 8 1/2 inches wide and 14 inches long. There are also standards in margin sizes for legal documents. Today, legal documents are most often formatted with Microsoft Word. Follow these basic steps for setting up a legal document format in Word.