That depends where you live, and where you want to send it. Better ask your post office.
4.1 OZ
2.15
how much a first letter that weighs 2.1 oz cost to mail
As of January 2014, it costs $1.15 to mail a regular one-ounce letter from the US to Canada, not including any extra services.
about $13
$16.25.
.45 + .20 = .65
61 cents
61 cents
, Could you please tell me how much postage I would need to mail a large envelope weighing 4.3 OZ to the UK?
Try here: http://www.wikisummaries.org/The_World_Is_Flat