The standard loaf of sandwich bread contains approximately 20 to 24 slices of bread, including the end pieces (often referred to as the “heels”). Loaves of specialty breads, such as Texas toast, sourdough and multi-grain, contain approximately 16 to 18 slices. Loaves of thin-sliced bread contain approximately 26 slices.
A slice of sandwich bread is generally 3/8- to 5/8-inch thick. The serving size, which is typically one to three slices, varies by manufacturer and type of bread. One slice of standard white sandwich bread contains approximately 50 calories, 1 gram of fat, 115 milligrams of sodium, 10 grams of carbohydrates and 4 grams of protein.