Set of 12 Cards w/ Envelopes of famous artwork by Pierre Auguste RenoirSet of 12

This set is actually from the art institute of Chicago. It was bought as a souvenir, never used them. The artwork is called 2 sisters from the artist Pierre Augusta. Renard, there are 12 envelopes and 12 blank cards or not. Thank you, cards or not. You know, mission guards are just blank, and that's about it. None are missing. The price tag still on the back