Size of Flesh Rings

Hoping I could get some advice on the finer points of choosing the diameter of the flesh ring.
My first reheading of a Quinto. Reheaded rope tuned drums in the past. Thinking that the inside diameter of the crown rim would be the inside diameter of the flesh ring--good place to start. If the new skin is thicker would I want a slightly smaller ring size, alternately for a thinner skin would I want to a slightly larger ring size. Going to keep the original heads in place so I do not want to reuse the original flesh ring.
peace, marcus
My first reheading of a Quinto. Reheaded rope tuned drums in the past. Thinking that the inside diameter of the crown rim would be the inside diameter of the flesh ring--good place to start. If the new skin is thicker would I want a slightly smaller ring size, alternately for a thinner skin would I want to a slightly larger ring size. Going to keep the original heads in place so I do not want to reuse the original flesh ring.
peace, marcus