I went to usps.com calculated 4oz envelope priority. Their is a cheaper option of $6.35 first class, but I will have no way of knowing if you received it or not, and who knows how long that will take to get to you. the option is yours but I can't be responsible for shipping time as well as getting lost etc. I would rather have it tracked and confirmed. Hope you understand.
4 oz!!! lol lead lined envelope? indian head penny + envelope = much less than 1 oz. if it is lost when sending something international it isn't your fault. or you can just refuse to ship international. (my choice)
only way i can get it accurate is to put a penny in an envelope take it to post office and have them weigh it and tell me a priceto ship to europe. do you have a postal code I can give them.