Hi ,
If you want to check postage prices in future you can use the "postal caculator" feature on the post office website in your country.
Jason

If you send a 9X12 or 10X13 it's $1.00 to send. So three stamps would work.

Yes two stamps will do the deal on any envelope bigger than a 6x9. Don't know about your post office dilemma, because I usually just put them in my house/street one .

It has been about a year or two since my last fan mail. I was just making sure 2 stamps on both envelopes (that includes the SASE) is good enough? and I was also wondering if I just drop them in any of the random 12 mail boxes they have lined up at the post office?