In the following sentence:

> 
> A seven year old kid stole the package.
> 
> 
> 

How can I ask about the kid's age? 

I know structures like 

> 
> How old was the kid who stole the package?
> 
> 
> 

But what about 

> 
> How old a kid stole the package?
> 
> 
> 

I've come across the pattern "How+modifier+noun" in this question: 

> 
> How big a tv should I buy?
> 
> 
> 

But I am not sure if it was asked by a native speaker.  

I'd like to know if the pattern can be used in my example about age, since every part of speech seems to be the same in both.

Also, I Know this structure: 

> 
> What size shirt do you wear?
> 
> 
> 

Can we use this pattern to ask about age, as in 

> 
> What age kid stole the package?
> 
> 
>