I wear size 10 or 10 1/2
A few notes.
The RX is a directional twin while Park Pickle and Carbon Credit are true twins. That is a noticeable difference and we should find out a little more about the riding that you want to do.
Rocker boards have less contact length that cambered boards of the same length. To many, they already feel "shorter" than a similar cambered board in the same length.
PS: You are looking at an amazing group of decks so all we need to do is narrow down to the best model for your specific needs and choose the perfect size.