Two new Oracle decks

I'm working on 2 decks, an animal deck and a Lenormand deck. They will likely be self-published & marketed through The Game Crafter.

What would you think about a card size of 3.5" x 3.5"? Or would you prefer the regular sized poker deck of 2.5" x 3.5"?

Every Lenormand deck that I have seen has been relatively small. Guessing you should stick with the poker deck size for that. With an animal deck, unless the images are very sparse, my vote would be for the larger size.