Final answer:
The portion size of calamari fritti is not directly provided, but can be estimated using methods suggested by the American Cancer Society, such as comparing to common items or using your hand for reference. A small handful or an amount similar to listed portion sizes of other foods may be appropriate.
Step-by-step explanation:
The portion size of calamari fritti is not explicitly listed in the provided reference materials, just as the portion size of other similar fried foods such as chicken (6 oz fried) is provided. However, the American Cancer Society suggests using common items like a deck of cards or your hand to estimate the size of portions. Since calamari fritti is a fried seafood, we can loosely relate it to the listed 'Shrimp, 1 cup (boiled)' as a seafood example, keeping in mind that fried foods should generally be consumed in smaller portions due to their higher calorie content.
Dietitians' advice can also apply, where for example, an appropriate portion size can be what fits into the palm of your hand. Since portion control is critical, especially with higher-calorie foods, consider serving calamari in a modest amount that would roughly equate to a small handful or compare in size to the other example portion sizes listed.