If the card is less than one ounce (oz) it will cost first class postage of 44 cents. You can use a Liberty Bell Forever stamp. This stamp has no denomination on it because once you buy it for current first class postage rate, you can use it anytime regardless if the postage rate increases.
There are other options you can put on the card as well such as receipt confirmation, insurance, etc... These cost extra then the postage rate.
If your card weighs more than one ounce then look up the rates on the US Postal service web site for more information.
To mail a standard-sized card from Washington to Arkansas, you would need a single first-class forever stamp, which is currently priced at 55 cents.
1
One.
Lots.
Ye,s you can if you are mailing from the US.
No, you must use local Israeli stamps
1 stamp is required.
Ask at a post office in USA !
One ... up to 1.0 ounce in weight.
sometimes 2 if its big if letter then one
Ask at a post office in Oregon.
Just one of the correct denomination for the fee or any combination of stamps of smaller value to make up the fee.
If it's a regular first-class regular letter, 45 cents worth of stamps for one ounce of mail or one Forever Stamp.