Case Size: 1/10.5 oz. Three Deer Brand Pickled Sour Mustard is a tangy, flavorful condiment perfect for adding to soups and stir-fries. Three Deer Brand Pickled Sour Mustard (10.5 oz) provides a sharp, sour flavor that enhances many dishes. Use it in stir-fries, soups, or as a topping for rice to add a refreshing and tangy contrast.