We ship all over the globe, and notice that several countries have a consistently slow post.
We wish to warn our customers before they check out:
On the checkout page, look at the ship-to country, and have a notice above the checkout button:
// for shipments to Italy //
La spedizione in Italia potrebbe richiedere dai 20 ai 40 giorni.
// for shipments to Brazil //
O correio para o Brasil pode demorar de 20 a 40 dias.
... you get the idea.