@8766c079: The recommended portion size for walnuts on a keto diet is typically around 1 ounce, which is equivalent to about 14 walnut halves. This serving size contains approximately 4 grams of carbs, 18 grams of fat, and 4 grams of protein. It's always a good idea to measure out your portions to ensure you are staying within your daily carb and calorie goals.