I did three series of the 2.5 inch by 3.5 inch in lots of 12 pieces (except series 3 which had 13 actual cards in it). A lot of people have missed out on the first batches so there will be a fourth wave with around the same amount of cards in it.
The sold out series two -
And the extra series 3 card was a Space Cat.
Here's a teaser for the upcoming Wave 4 (I got a few Space Cat suggestions online from some of the collectors and supporters...) -