How do you know when to stop?

You just might be tired of seeing her but I just could not stop doodling, it kept calling for more. But I think now she is done. I think!...

How do you other artist come to the point of "finished" ? Do you ever really know when that is. I usually know when I do a simple folk art portrait but when I do something like the mermaid with all this detail I get lost...I can go on and on and on. Them I'm afraid it will get muddy.

So other artist let me know if you have a secret you can share or do you feel the same as I.....

Trailer Trash Thelma

Finally finished " Trailer Trash Thelma" I added the smoke trail (Thanks Gina) just what she needed to feel complete. I love her as she has roots in my past on many levels. Thelma was my grandmothers name but she was a far cry from Traler Trash Thelma. My grandmother was a staunch Baptist tee totaler. No drinkin, smoking,dancing or card playing. Her grandkids adored her. Not sure when she will be up for sale but soon I hope. It will be hard to let her go.