The only limit is the size of the space. You can write very small & use lots of words.
You will need a postcard stamp. They currently cost $0.29.
Postcard
how much writing is 1KB
On a postcard, the sender's address is typically placed in the top left corner on the back side. It should include the sender's name, street address, city, state, and ZIP code. This ensures that if the postcard isn't delivered to the recipient, it can be returned to the sender. The recipient's address goes on the right side of the postcard, along with the postage.
On a postcard, the sender's address is typically placed in the top left corner on the back side. It's important to include the sender's name, street address, city, state, and ZIP code. This ensures that the postcard can be returned if undeliverable and helps the recipient identify the sender. The recipient's address is written on the right side of the postcard, along with any relevant postage.
$.90 More information: http://pe.usps.com/text/Imm/fh_014.htm#ep3576772
A postcard that weighs around an ounce will be around thirteen dollars through international mail. The bigger the postcard, the more it costs. The cost can be as much as thirty dollars.
The postage for a postcard is valued at $0.33 as of 2014. This can vary depending on the size of the postcard and may change as the Postal Service changes its rates.
It did cost $1.10 to mail a postcard in the US in 2003.
0.15oz / 4.25grams
27
It all depends on how much you'r postcard weighs. The more it weighs, the more money it will cost.
The current USPS postcard rate from the US to Chile is 94 cents.
postage for a postcard sent from Australia to the U.S. costs AU$1.40.
50p
It depends on where you are sending it from.
1 cent