（1）we have all sizes of bowls of noodles
（2）we have all size bowls of noodles
（3）we have bowls of noodles in
all sizes
Which is correct and natural?

Question

（1）we have all sizes of bowls of noodles 
 （2）we have all size bowls of noodles
 （3）we have bowls of noodles in
all sizes
Which is correct and natural?

Answer

The third one is the correct one. You could also say: 
We have noodle bowls in various sizes. 
We have bowls for noodles that come in different sizes. 
And many more. 
Hope this helps! :)

Answer

Number 3 is okay.... I would say we have various serving sizes.

Answer

#3 sounds the best to me, but I would put it even more simply as "we have have noodle bowls in all sizes"