"Small things come in big packaging."
[For me] It means even if small things are only that small, it is still big. Why? Imagine those who can't give you expensive things or such but, they still trying to effort to give you something, even it is only small or not that expensive. So what if it's only small? At least, they effort to give you something because maybe, they care about you. And by that, small things become big/ small things comes in big packaging....
--Mizu