Several things pop out of your letter. The first is that you are not so sure about your design just now. That is OK, and even wise. Now is the time to play with your thinking. Take the art work to a copier and make a dozen copies at many sizes, from way too big to way too small. Place them on yourself in different positions. Put the open side up and other places.
You said that circular is important. What you have is wonderfully primitive. Try redrawing the art with a compass - engineered precisely. See how you feel about that.

You seem to be a tattoo collector. That is you want individual tatts which carry vitality and integrity in themselves. Your art lends itself well to that. However if you think you might want to extend it into a greater tatt growing to embrase your body, you will have a difficult time doing that. Your piece has a strong character and stands well on its own.

You are thoughtful. You will make a good decision. Be sure to post a picture when it is completed.