How old do you think Tintin is?

OH, boy...Me personally, I think Tintin did age during the series- but only by ten or so years. I think he started out as 15 then gradually, he aged a bit.
15-25 <----

Je dirai 18/19 ans dans ses débuts et 20/22 vers la fin

Tintin ? Son âge ? Mais il n'a pas d'âge ! Il est immortel. Tout simplement.

16 ans

17

18 years old probably

14

25

20 ans environ

19 ans

20 ans

Selon hergé 14 à 17 ans, journaliste trés précosse avec le permis😅

Logically 20
95 otherwise🤔

Il est asser jeune

I saw an interview in the youtube and Hergé said Tintin was 14 years old.
If you want, here is the link: https://www.youtube.com/shorts/UNuFHy1KAXU

I believe it is widely accepted that he is in his late teens, about 19, which is my daughter's current age.

Entre 15et20ans

Moi, je dirais que Tintin à 19 ou 20 ans.

22

Early 20s