Order of the Stick Trivia XXIV: What do I need a twenty for, anyway?

[ZhonLord]

Uhm, they were converted from 3.0 to 3.5 in that comic. The shrinkage is a reference to the fact that in 3.0 weapons for player characters all had their sizes indiependent of the character's size (so for example a longsword would be one-handed for medium characters, but two-handed for small ones, while a shortsword would be a light weapon for a medium character and a one-handed one for a small character), while in 3.5 each weapon comes in multiple sizes fitted for different-sized characters, so that a longsword for a medium and a longsword for a small character would both be one-handed.
As part of that, Belkar's daggers shrink from "dagger" (1d4 base damage) to "small dagger" (1d3 base damage).

Fine, it can qualify. My intended second answer was "[Fenrir] made the green ones Medium for some reason, as if that changes anything."

Open question.