"This postcard is mine."
Translation:Αυτή η ταχυδρομική κάρτα είναι δική μου.
February 6, 2017
Well, κάρτα all by itself doesn't necessarily refer to a postcard. If you'd like to do so, I'd suggest that you use ταχυδρομική κάρτα or καρτ ποστάλ, just to be a bit more specific. ^.^
March 1, 2017