When will conan grow up?

I don't think he will grow up :p

permanently, i don't know.

but if that happens.............

Well think about it for a second. If Conan returns to his normal body the main story line will end! What might happen is like most long standing animes, they will either let it died leaving the fans wanting meer of will start a new series with a whole new back story much like Naruto becoming Naruto Shippuden. Does that make since?

i don't what conan be big conan is cute when kid

when he drink the sedative from haibara

Conan will grow up, but I'm not sure what is the exact time.

Considering That Conan is Shinichi and that he's human,he grows each day..but I do recall there being an OVA "Stranger in 10 years" when Conan grows up.