GioPiantoni I am sorry for the inconvenience, but it never happened.
I think if you had already purchased a badge and you were not sure of the diameter, you could ask me for.
However I will update the descriptions adding the diameter.
For the moment, if you are interested I created this: http://shpws.me/O5dv
GioPiantoni@sdn4022
The badge is flexible and is in the form of many dimensions of the head tube.
I recommended using a strong double-sided tape.
But if you have a particular head tube diameter, I can design a special badge.
I'm sorry for the probelm.
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