the whole area could be a dime sitting on her leg it is that thin, maybe thinner and raised above the skin, relatively smooth, it is whiter on the edges like an outline, and greyer towards the center, you may see some even darker right in the middle but I think that is just a little charcoal left over, I can see the grain of the fine charcoal on the surface making a small line sort of down the center ,I washed her carefully but just rinsed that area by spilling water, rather than useing wash cloth like I did around the dime shaped area, because I wanted to be gentle with that not knowing if it would burst..