The simple way to determine the size of your patch is by adding the height to the width and then dividing that sum by 2.
For example, consider the patch below;The height is 2.5 inches, and the width is 2 inches. Therefore, the size of this patch is (2.5 + 2) / 2 = 2.25 inches.
Patch size equation : ( Height + Width ) / 2
*Note: Make sure to measure the highest part of your design and the widest point.
The most common patch sizes range from 3 to 4 inches, which is ideal for clothing, hats, and more.