Right now I have Hera on a medium and a small mouse feeding. I give her one of each which is usually around 35g, she weighs 250 so the amount is fine. What I am wondering is what size rat does that approximate?

I'm looking to switch her over to rats since from what I have heard they are more nutritious and I would only have to feed her one rat instead of 2-3 mice. Does anyone know what size I would be looking at?