Shipping to Europe

I scanned the "shipping" threads and did not find the info I seek. I apologize if this is out there somewhere are already and I'm sure this topic has come up before.

I am shipping around 20 sticks across the sea and am wondering the best way and courier to do so with. In the past I've sent less than 10 sticks in a USPS Priority envelope with no problem. I don't think the 20ish sticks would fit comfortably in the same envelope though. Any help would be appreciated. Thanks.