Duplicate question
yes
yes, you pretty much ALWAYS need a stamp to send a letter in the mail. :)
3 Just one stamp will do it for a normal letter.
The stamp has to be accepted where you mail the letter. If you are mailing in Canada, you need a Canadian stamp. If you are in the US mailing to Canada, you can use a US stamp.
That is what they are used for, to send a letter to another place in the country.
No.
Yes, you do
You can send a letter from Texas to Oregon with one stamp.
It costs $0.98 to send a letter to London.... no special stamp needed since they now all go via air-mail.
no you do not need a stamp
1
one ounce.