Ok, I've figured out that the card size is 12CM by 21CM. Gotta love metrics.
I'm currently making a team of 6 custom characters. As I play test them, I will post pictures of them them, plus their stat cards. I am not going to be making Zombivor versions of these characters. As neat as the concept is, I'm not using the zombie version of the characters as players. they will be used when the character dies and returns.
To start, I will give you a hint as to what these characters are:
"Jinkies it's the Cops!"