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Girth is a measurement of the distance around the trunk of a tree measured perpendicular to the axis of the trunk. In the United States it is measured at breast height, or at 4.5 feet (1.4 m) above ground level.
In this case a better option would be to measure the standard girth measurement at 4.5 feet above ground level on the high side of the tree and note this in the measurement description. If measuring a mountaintop forest of stunted trees only six feet tall, a girth measurement made at 4.5 feet would be meaningless.
The same review analyzed the results from ten prior studies where measurements of erect penis size were made by researchers. They reported an erect penis to be between 12.95 and 13.92 cm (5.1 and 5.5 inches, respectively) in length, a result significantly below the average obtained in self-reported studies.
A tree caliper is a tool to measure the diameter of a tree. When used in forestry, the tree caliper tool measures the DBH or "diameter at breast height" of a tree that is growing in a landscape of any kind. The measurement is generally made at 4.5' or 1.4m above the soil.
The two most common instruments used to measure DBH are a girthing (or diameter) tape and calipers. A girthing tape actually measures the girth (circumference) of the tree; the girthing tape is calibrated in divisions of π centimetres (3.14159 cm). The measure assumes the trunk has a circular cross-section and gives a directly converted ...
Measurements may include just the volume of the trunk, or the volume of the trunk and the branches depending on the detail needed and the sophistication of the measurement methodology. [citation needed] Other commonly used parameters, outlined in Tree measurement: Tree height measurement, Tree girth measurement, and Tree crown measurement ...
A wiffle, also referred to as a WAM for Wiffle (ball) assisted measurement, is equal to a sphere 89 millimetres (3.5 inches) in diameter – the size of a Wiffle ball, a perforated, light-weight plastic ball frequently used by marine biologists as a size reference in photos to measure corals and other objects.
[1] [5] A 2003 study by the group of Pendergrass et al. also using castings as a measurement method, measured vaginal surface areas ranging from 66 to 107 cm 2 (10.2 to 16.6 sq in) with a mean of 87 cm 2 (13.5 sq in) and a standard deviation of 7.8 cm 2 (1.21 sq in) [6]