Sunday, July 10, 2005


Patch Size is usually given in half inch increments (eg: 2.5", 3", 3.5"...etc.). The size will not give you the dimension but it is calculated from the dimensions. Here's how that works.

Patch size is the maximum height added to the maximum width and divided by two. For example, if your patch is a regular diamond shape (like a baseball diamond), the max height would be from point to point vertically and the maximum width would be from point to point horizontally. If those two dimension are both three inches, then add them together to get 6 inches, divide by two to get three inches and that's the size of the patch.

For you math whizzes, that simply means that patch size is the (arithmetic) mean of the two orthogonal maximum dimensions of the patch.

Here's an example of some three inch patches.

A. Square: 3" x 3"
B. Circle: 3" diameter
C. Oval: 2.75" x 3.25"
D. Rectangle: 2" x 4"