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.
Much of the rest of the world, however, uses A4, which is 21 cm x 29.7 cm. In the U.S., a letter sized sheet of paper is 8.5 x 11 inches; legal size is 8.5 x 14 inches<br /><br />Much of the rest of the world, however, uses A4, which is 21 cm x 29.7 cm.