Birthday cards in Sicily?

There are stationery stores that you might try. I'm sure I've seen gift wrapping paper in those stores and would assume they also have cards. Also try tobacco shops (tabacchi). If they don't have cards, ask where you might find them.

Send a postcard.

If you do find b-day cards there they likely will be in Italian. Perhaps that is what you want. ?

I would be inclined to buy the cards before departing and mail them from there if if the stamp and postmark are what is your intent.

Or just mail the card before you leave

They will be available in bookstores and stationery stores. Try the term "cartoleria." I'd also try to get stamps and use mail boxes from the national Poste Itlaliane rather than a private mailing service that might advertise to tourists.

Thanks for all the information and suggestions!

Jodeluca,

Don't be surprised if you arrive back home before the postcards! ; )

Here's a recent post about sending postcards from Italy.

Have a great trip!