I've noticed a niche trend with ultraman having the ultras be shrunk down to human size and or even transforming at human size to fight the kaijin-sized monsters. while to my knowledge i've seen ultraman and leo get shrunken down by another kaiju and seen ultraseven/tiga/gaia appear human size (ultraseven can even shrink down to miniscule size to fight a microbe-size kaiju inside a woman as a parasite), i am curious as to what else presents itself there.
Alternatively i've also seen kaijin grow to giant size like sentai monsters, such as a seijin using the seeds of Juran to grow.