4 g of protein per bun. 5 g fiber per bun. 33% less calories than regular wheat buns (Wonder 80 Calorie Wheat buns contain 80 calories per 43 g serving: Market leading wheat buns contain 120 calories per 43 g serving). Soft. Delicious. Nutritious. An American classic. Wonder has been a delicious part of American meals for generations. Soft texture. Unbeatable taste. Wonder offers buns to satisfy every generation in your family. And because they're from Wonder, you know they're soft and delicious. Wonder 80 Calorie Wheat buns are a great way to eat lighter. With 33% less calories than a regular wheat bun, each bun is a part of your family's healthy diet.