This is a pack of cards for taking notes on observations. I picked these up and have used about 20, but have gone completely to log books and laptops. Just don't need them. They are 3x5 (see the picture below).
They are opened, and a few have been used...but not many.
I have no idea how many are here, but the smallest pack he sells is 200 for 8.95 + shipping.
You can have these for $5.50 shipped.
Thanks for looking.