At 73 grams your snake can eat a small adult mouse or a fuzzy rat (those are between 6 to 14 days) for the rest you need to eyeball it.

While true that their can be a difference in weight with feeders that are of the same name, appellation is based on age not the weight.

Pink Mice and Rat 0 to 5 days

Fuzzy rat and mice 6 to 14 days

Hopper mice 15 to 20 days - Rat Pup 15 to 20 days

Weanlings mice and rat 21 to 27 days

Adult mice 28 days and over - Small rat 28 days to 32 days

etc