A serving of Hershey's Kisses is 9 pieces. One serving has 13 grams of fat, 230 calories and 24 grams of carbs. One 13-ounce bag has roughly 9 servings in it...about 81 kisses. So if I eat half a bag, I have consumed 68.5 grams of fat, 1, 025 calories and 108 grams of carbs. I said IF. Fortunately I think I only ate about 1/4 of the bag, so I'm okay.