Can I use letter stamps as postcard stamps? - Quora

Are old cancelled stamps worth anything? - Quora

What country was the first to perforate their postage stamps? - Quora

Can you mail a postcard without an envelope? - Quora

Can I use letter stamps as postcard stamps? - Quora

Who was the first living American to be depicted on a postage stamp? - Quora

What do you think is the most beautiful US stamp ever issued? - Quora

When sending documents in the mail in the United States, under what conditions do you need more than one stamp? - Quora

Can I use first-class stamps bought in the UK on my letter being sent internationally to the USA? - Quora

Do post office stamps have serrated edges? - Quora

Is the size of postage stamps getting smaller? - Quora

Is the size of postage stamps getting smaller? - Quora