hi!I am new here and I have few more questions.What must be the size of the envelope that I will send;A4 OR smaller;and what about the size of the SAE;sould it be A4;

hi!i am from greece and I want to send a letter to a celebrity in USA.In order to get a reply I bought 3 International Reply coupons.In my post office they told me to just inlude them in the letter.however,I read here that they need to be stamped with the date of purchase.So I want to know if its ne...