Each Stamp also shows how many grams of whole grain ingredients are in a serving of the product. Even though the image below shows just three different numbers (23g, 32g, 20g), when you look on your grocery shelves you’ll see a wide range of numbers, reflecting the whole grain content of a serving of that specific product. If a product contains large amounts of whole grain (23g, 37g, 41g, etc.) but also contains extra bran, germ, or refined flour, it will use the 50%+ Stamp or the Basic Stamp (and not the 100% Stamp).