Wow I hope I don't get flamed for this. **Full disclosure: My son has two pet rats that I really enjoy playing with and all my rats are respected and well taken care of whether they are to be pets, breeders, or feeders**
My son(8) and I refer to rat sizes a little bit differently. I usually have him grab feeders for me out of the rack. Which is me placing an order. Here is how the last feeding went:
2 snacks (rat pups)
11 appetizers (weaned rats)
5 dinners (small rats)
Mice are "treats". We joke that the size of his full grown females would be "buffet" but none of my snakes will get that size i plan to top out at large smalls lol. (I'm sure Snowflake and Isabella are happy for that)
Oh and for my snake rack it is a "Snake Shelf" Instead of a "Book Shelf" its a custom build out of Maple and it resembles a book shelf.