Replying to Full Tilt Fit

I want to purchase a pair of FT hot doggers, I wear about a 13 street shoe, but really i'm a 12.5. the size 30 is the only pair i can find online, and i dont have any access to shops that carry them to try them on. I'm thinking if I purchase a size 30 (size 12), they'll fit, because from what i've read the intuition liner really adapts to the foot, therefore it would actually fit.. any body have any real world advice about what i should do?