If volume - 1 US teaspoon = 0.17 ounces US<br />If weight - it depends of the density of your foodstuff. For example<br />1 US teaspoon of water = 0.17 oz<br />1 US teaspoon of buckwheat = 0.15 oz<br />1 US teaspoon of honey = 0.23 oz and so on.
Comparison of Letter (shaded light blue) and Government letter sizes with some similar paper and photographic paper sizes. Letter or US Letter is a paper size commonly used as home or office stationery in Canada, the United States, Mexico and the Dominican Republic. It measures 8.5 by 11.0 inches (215.9 by 279.4 mm). US Letter size paper is a standard defined by the American National Standards Institute (ANSI), in contrast to the A4 paper used by all other nations, which is defined by the International Organization for Standardization (specifically, in ISO 216).
Paper Sizes - commonly used in U.S. Offices. Office paper sizes as Letter, Legal, Tabloid and more. The ISO standard paper sizes are not commonly used in the United States and Canada. Instead paper formats like Letter (8.5 x 11 inches), Legal (8.5 x 14 inches), Executive (7 x 10 inches), and Ledger/Tabloid (11 x 17 inches) are widely used. The Letter, Legal, Tabloid, and other formats (although not these names) are defined in the American National Standard ANSI X3.151.