Avery Postcards For Laser or InkJet Printer, 5.5 x 4.25 Inches, White, 200 Per
Price: $10.99 at Amazon
I've used Avery products for years. This sheet of postcards printed just fine in my Canon inkjet printer. The stock has a decent weight to it and does not feel overly flimsy. It is not as stiff as the traditional drug store post card but it has a heavier feel than I expected. I used the Avery site avery.com/print for my printing test. The online software can be accessed with a simple sign up. There were a surprising number of designs to choose from and a simple to use editor. The post cards turned out well and I only had to trash one page as I turned it wrong to print the back. These would be fine for sending out announcements regarding events or whatever, assuming you still use snail mail. They would also work as tent cards for table placement or trade shows.
From the vendor:
Create invitations, announcements and reminders with your laser or ink-jet printer.
Feeds automatically from paper tray.
Heavyweight card stock with ultrafine perforations, separates cleanly.