I wasn't thinking like that.. sorry I didn't make myself clearer. I meant:
Generally useful links:
Converting between oz and grams:
http://www.gourmetsleuth.com/gram_calc.htm
Converting between inches and cm:
http://www.manuelsweb.com/in_cm.htm
USA
Postage Calculator:
http://www.usps.com/tools/calculatep...lculatepostage
Domestic Price Charts:
http://pe.usps.com/text/dmm300/Notice123.htm
International Price Charts:
http://pe.usps.com/text/Imm/immctry.htm
Note: USPS increases postage prices on May 11th, 2009.
New Price list at:
http://pe.usps.com/PriceChange_May20.../PriceList.pdf
Note: Stamps without denomination (printed value) can be used for international mail. The value of such stamps is linked to either a current or a former domestic postage price (e.g., the “Lady Liberty and U.S. Flag†stamp has a postage value of 39 cents). The postage value of the Forever Stamp, is always the domestic First-Class Mail single-piece 1-ounce letter price that is in effect on the day of use (affix more postage when neccesarry). Source:
http://pe.usps.com/text/imm/immc1_020.htm, 152.2 Stamps, c)
Canada
Postage Calculator:
http://www.canadapost.ca/Personal/Tools/RC/Canada.aspx
Rates & Prices (Letters):
http://www.canadapost.ca/Personal/Ra...Documents.aspx
United Kingdom - Mainland, Scotland, Wales and Northern Ireland
Airmail:
http://www.royalmail.com/portal/rm/c...diaId=53800712
Surface Mail (Letters for outside Europe only)
http://www.royalmail.com/portal/rm/c...3&catId=400037
Note: England, Scotland, Wales and Northern Ireland all have the same stamps. Stamps pre-decimalization (before 1971) can no longer be used.
First and second class stamps can be used for international mail, they will count as their current value if no other denomination is on the stamp (confirmed by Royal Mail Service).
United Kingdom - Isle of Man
Price Guide:
http://www.gov.im/post/postal/guide.xml
Isle of Man does use different stamps than mainland UK. Stamps purchased in the Channel Islands and Isle of Man cannot be used in UK, nor can UK postage stamps be used in the Channel Islands or the Isle of Man.
Australia
Postage Calculator:
http://www1.auspost.com.au/pac/ (use Post Charges Booklet link for a pdf price overview)
Austria
http://www.post.at/en/129.php
Note: current stamp currency is Euro, "Schilling" currency stamps can no longer be used.
Belgium (i
believe "tot en met" is the size for 8x10)
in Netherlands Lang.:
http://www.post.be/site/nl/letters/i...ffs/index.html
in German Lang:
http://www.post.be/de/brief/tarife/i...nal/index.html
Note: current stamp currency is Euro. All stamps denominated in Belgian francs (BEF) are valid indefinitely. 1 Belgium Franc = 0,02478 (or 40 Francs = approx 1 Euro)
France
http://www.laposte.com/find-a-postage-rate-18
Note: current stamp currency is Euro. "Franc" stamps 'will remain valid for prepayment for an unlimited period'. 1 Franc = 0.152449 Euro
Germany ("Großbrief" for 8x10) (correct me if I'm wrong)
http://www.deutschepost.de/dpag?tab=...017475_1009418
Note: current stamp currency is Euro, "DM" currency stamps can no longer be used.
Greece
Note: current stamp currency is Euro, previous currency stamps can no longer be used.
Hong Kong
http://www.hongkongpost.com/eng/postage/index.htm
Ireland: (large envelope for 8x10)
http://postage.anpost.ie/
Note: current stamp currency is Euro, previous currency stamps can no longer be used
Italy
http://www.poste.it/en/postali/econo.../a_index.shtml
(Flats for 8x10, Prices link on the left)
Note: current stamp currency is Euro. All lire stamps remain valid indefinitely. 1 Lire = 0.0005165 Euro (or 2000 Lire = approx 1 Euro)
Japan
Postage Calculator:
http://www.post.japanpost.jp/cgi-cha...x.php?lang=_en
Price Lists:
http://www.post.japanpost.jp/int/cha.../index_en.html
Netherlands
http://www.tntpost.nl/voorthuis/brie...-kost-het.aspx
Note: current stamp currency is Euro. Guilder/cent stamps to remain valid indefinitely.
New Zealand
Postage Calculator:
http://www.nzpost.co.nz/Cultures/en-...ls/Ratefinder/
Price List (Letters):
http://www.nzpost.co.nz/Cultures/en-...ationalLetters
Norway
http://www.posten.no/en/ (Price List link on the right, the "Download Price list")
Poland
http://www.poczta-polska.pl/ (seems to be only available in polish; if you know a direct link to their rates post below)
You can buy stamps at:
http://www.poczta-polska.pl/znaczki/en/oferta.php (english)
Spain
http://www.correos.es/ENG/01P-Enviar...-CPostales.asp
Note: current stamp currency is Euro. I'm
not sure if Peseta currency stamps are still valid.
Sweden - karra28 - correct me if I'm wrong!
http://www.posten.se/ptm/ptm_do.jsp?action=getPriceList (seems no english version is available? I believe under "Ekonomibrev utrikes" you can find price lists (Prislista) in PDF format for international mail)
Envelope sizes, weight limits, etc:
http://www.posten.se/ptm/ptm_do.jsp?...tFactSheetList (under "1:a-klassbrev utrikes", select "Faktablad engelsk version" for an english PDF)
Switzerland ("Large Letter" for 8x10)
http://www.post.ch/en/index/uk-priva...se-economy.htm