Front: I'm not sure how many problems I have because math is one of them.
Inside: Blank
(this would be perfect with our 99 problems card too!) 
Cards are printed on tree free cotton paper and paired with a 100% post consumer brown bag kraft envelope.  That’s smart.
size: 4.25 x 5.5
paper: 100% cotton paper
paper color: ecru/off white shade
envelope: brown kraft  
packaging: clear biodegradable bag made from plants
ink: dark gray
printing: letterpress
Photographed at the Pharmacy Museum, New Orleans