Hallis;
For any braided knot to look right, it needs to be the right size for the circumference of the object it is put on. The number of bights is the determining factor. If it is too big for the work it is going on, it bunches up into a wad, and if too small, it flattens out to a bunch of parallel strings.
The optimum finished size is approx, (1.4X the width of the string) X the number of bights.
The secret is that there is not a turkshead, but an almost limitless number of them that will fit anything from a pencil to a barrel.
Sidney Wood