Kanji at smaller sizes

I think your issue’s already been resolved, but I’ll just drop Jitai, the font randomizer and Niai, the kanji disambiguator here, because they’re really really helpful (imo) and somewhat underutilized, even by those who use scripts. They don’t alter the text size, but they do help with recognition of handwritten and weird-looking kanji. Do get something like ArmedBanana — it’ll help with your understanding of stroke structure and standard variability immensely.