A:
That all depends on the inside size of your arrow nock and how much "press" or "clinch" you want as you release your arrow. When I shoot cedar arrows I use "Classic" nocks which have a rather large slot, so I am apt to use .021" or .024/5 diameter braided polyester serving. With carbon arrows I use the smallest .018 diameter serving for a good fit.
Answered on 10/28/2011 by Camo Bowman from Lambertville, MI