Originally Posted by QuilterInVA
Exchange plans do have serving sizes. It has nothing to do with your calorie budget, you are just eating more than one serving. Meat is 3 ounces, pasta and rice 2 oz. uncooked, cooked vegetables 1/2 cup, salad greens 1 cup, fruit 1/2 cup, bread 1 oz., dairy 1-1/2 oz. cheese, 1 cup milk, etc.
Actually, a 3 oz serving of meat would be 3 protein exchanges, not one, and 2 ounces of uncooked pasta would be almost 3 bread exchanges not 1 (because eacfh bread exchange contains 60-80 calories and 2 ounces of dry pasta has about 200 calories).
Now you can choose to look at the exchanges as serving sizes, but I don't think that makes much sense as the word serving size is generally used to mean the appropriate amount per meal. Most people do not consider one ounce of meat or 2/3 oz of pasta as a serving size of either.
Now some diabetic exchange plans DO tell you how much to eat at each meal (because some diabetics need to spreak their calories out in a specific way).
So some diabetic exchange plans may recommend 3 exchanges of meat at a meal (in which case, the serving size would be 3 ounces, but the exchange values would be 3 meat exchanges). So exchange value and serving size aren't entirely interchangeable terms.
You can choose to see them that way - in which case the 3 ounces of chicken would be 3 servings. I don't think that makes a lot of sense if you're wanting to communicate clearly with others, because if you say "I ate three servings of chicken," most people will assume you meant a lot more than 3 ounces.