WPI tool question

[Marlet]

I cannot find the answer online but I imagine there has to be one to my question!

On a wpi tool is there a base thickness for the rod portion? I have seen people say that it's ok to use a pencil or a ruler or thick dowel. Wouldn't a pencil yeiled different results than a dowel equal to a size 10 needle? Does it not matter just as long as you are consistent and use the same thing over and over?

[sasayaki]

It doesn't matter the diameter of what you wrap it around because you're not counting the length of the yarn, but how many times it wraps around the needle/pencil/big toe. It's more about the "width" of the yarn. Try it around a few things and see if you get the same result.