In contrast to yesterday's large blog post, here's a small one.
On Thesaurus.com I looked up a word (idiot, actually), and the tip at the top of the screen said "why use a small word to define small? Use four syllables instead (linked to diminutive)".
So I embarked on a plan to construct an unfeasibly large word to mean small.
As always, Latin works.
Contrapraegrandis wins for me. If you can construct something larger, feel free to comment. :-)