Thanks for the tip off Jason, I looked at the files and thought they would be really handy thing to put on my next Arc order. Unfortunately the description does not indicate the size!
Well to be fair it does state the length, but the 'diameter' or file thickness is a mystery. Having just looked again I see the second picture indicates that this file is more like the size of a needle file, with half its length being a handle. Even so knowing the width would be good.
Ian P