Choosing the Right Prey Size
A good rule is to feed prey roughly the same width as the widest part of your snake's body.
Typical prey size progression:
Pinkie mice → Hatchlings
Fuzzy mice → Juvenile snakes
Hopper mice → Growing snakes
Adult mice → Adult smaller species
Rats → Larger snakes
https://www.siarfrozen.co.uk/collections/frozen-mice-snakes-exotic-carnivores
https://www.siarfrozen.co.uk/collections/frozen-rats-for-reptiles-exotic-carnivores