Case Size: 1/1 gal. Hellman's Real Mayonnaise is a creamy, rich condiment, perfect for sandwiches, salads, and dips. Hellman's Real Mayonnaise (1 gal) is a creamy and flavorful mayonnaise, crafted from premium ingredients. It provides a smooth, rich taste for a variety of applications such as sandwiches, salads, and dips.