In cases like Kuririn and Yamcha, they suffered physical changes that "threw" them into the physical state they were in when they were six years old. Kuririn loses his hair and becomes bald, while Yamcha, who has short hair, now has a longer hairstyle that dates back to before the beginning of Dragon Ball.
At the same time, Bulma, Chi-Chi and Kame-Sen'nin look like "chibi" versions of their adult versions. Could they have been like this when they were six? Technically yes, but I don't see why they wouldn't try to differentiate them a little from the adult version.
Rejuvenation got me a little confused
Re: Rejuvenation got me a little confused
Wouldn't their clothes be a little loose as they shrink into child size too? Just a thought.
The world is your's.