"Aamir's letter is brief." should be accepted~
Jeje... I got it wrong :-[ How do you say "Aamir's short letter"? I know that might be very different but I don't know what I was thinking pfff xd
'Aamir's short letter' would be: आमिर की छोटी चिट्ठी।
I am sure poor Aamir has letter envy.
Aamir's holidays are short
चिट्ठी is used as "leave/vacation" by my in laws. This might be an Army/Fogi thing but I "Aamir's leave is short." or "Aamir's holiday is short" would be correct.
क्यों नहीं ? आमिर चिट्ठी छोटी है।