A is for Asymmetry: Look for moles where the shape of one half is different from the other.B is for Border: Look for moles with irregular, scalloped, or jagged borders.C is for Color: Look for moles with multiple colors or variation in color-especially shades of black, brown, blue, red or white.D is for Diameter: Melanomas are usually larger than six millimeters (the size of a pencil eraser) but they can be smaller too.E is for Evolution/Evolving: Moles that are undergoing ANY kind of change, especially as outlined above, need to be evaluated by a medical professional. Want to read more? Subscribe to one of our monthly plans to continue reading this article.