"यह क़मीज़ पहनो।"

Translation: Wear this shirt.

[Olivier216505]

I think it is कमीज़ and not क़मीज़

[RanzoG]

qamīz
If you ever want to write Hindi as "Urdu" (i.e. in Arabic script), it will help to distinguish k and q wherever possible.

[HappyEvilSlosh]

I thought it was यह when direct but इस when oblique, so why isn't this इस क़मीज़ पहनो?

[yuhua1a]

It is not in oblique case in this sentence but rather in direct case since it is a direct object.