You would need to know, not only the dimensions of the box, but also the entire weight of the box, plus contents, as we no longer have "Postage Due" stamps, any more... But, now I am curious, since you are getting it inspected any way, why limit yourself to just 12 rhizomes?
Because, I thought Euro Postal rates are fairly high, especially when compared to ours...which you now have to add, also.
