Yes, I knew about the 15% rule.. We actually took our scale to the show and weighed a Hopper, that's how we knew it was 27 grams. So, with that said, 15% of our snakes weight is 30 grams.. So we bought Hoppers instead of Pups..
We just weren't sure on the size compared to her head. As far as the rule about prey being the size as the girth of the snake, we are right there or the prey may be a little bigger around than she is..

Thanks! Bill