i-adjective
Dialectal (Hokkaido, Tohoku) and colloquial adjective meaning 'small' or 'little', similar to 小さい but with a cute or folksy feel. Often used in casual speech.
See also: 小っちゃい
この犬、ちっちゃこくてかわいいね。
This dog is so tiny and cute, isn't it?
ちっちゃこい頃はよくここで遊んだもんだ。
When I was little, I used to play here a lot.