When you begin comparison shopping, you may also find that buying “economy size” products isn’t always the best value. Some companies trick consumers by simply offering an economy size, since many will assume it is cheaper to purchase a product in bulk. That’s not always the case. Sometimes, the larger package costs more per unit than the regular size option. Comparison shopping helps consumers choose the better value, when they check the price per ounce or price per unit carefully and compare it with similar brands.