Hi Alexender,
of course I can!
The overall length is 11.4 cm, the (quite irregular) maximum outer diameter is 4.4 cm, and the bore is 14.86 mm. The diameter of the touch hole, again irregular as it was not bored but struck thru the white-hot iron with a hardened prick, is ca. 6 mm.
I'd like to see images of the replica!
Best,
Michael