Below, 2oz. of DRY pasta. Not much to it, just 2oz. of pasta, weighed out. Not very impressive, and doesn't amount to a whole lot.
I boiled this in a small saucepan, separate from the big batch boiling for the rest of the family.
Here it is after being thrown into boiling, salted water for a bout 12 minutes.
Not a huge difference visually. Maybe doubled. But less pasta than my kids would eat in a sitting. More importantly, is the weight.
The COOKED pasta comes to 126 grams.
Dry pasta: 2oz (aka 56 grams)
Cooked pasta: 126 grams (aka 4.3 ounces)
So, a simple calculation would be that you can measure out 4 ounces of cooked pasta to equal the 2oz. serving size of dry pasta.
When eying it up in my bowl, I figured it was about the size of a Lean Cuisine or other pre-packaged foods for fatties. It's a normal serving size. I ate it, with a little bit of sauce, some olive oil and parmesan cheese, contemplating the me a year ago who would probably eat double that amount. Most restaurants give double or triple that for their portion sizes.
Hope that's helpful to someone else. It sure helped me.