Honestly, it doesn't seem worth it.
Smaller meal size, every four days would be acceptable. As long as she has completely digested her prey.
The point I was making is; it's not just about size. It's also about age. She has to be at a certain life stage to breed safely.
Honestly, if you are that eager, pick up an adult pair, they aren't that expensive. I wouldn't risk and animals life just to breed at a earlier time.
Do you have any pictures of them? What morph?