Question about bundled size vs advertised size

[Sparkenstein]

Describe the bug
it's not a bug but more like discussion, I don't see discussions enabled on github so opening here.

I was doing some testing with dayjs, when I observed that the bundle size dayjs advertises is 2kb. But in my testing, I could not get it to 2kb no matter what.

My code:

const dateStr = "2024-03-15";
const parsedDate = dayjs(dateStr);
console.log("Parsed date:", parsedDate.toDate());

after bundle and checking with bundle analyzer I got:

So is the advertised part "2kb" is after gzipping? Anyway that's coming as 3+kb in my testing
and 7kb before gzipping. It's still pretty small, but just wanted to know if the 2kb part is still valid or am I missing anything