Deciding between medium and large comes down to risk tolerance and current promotions. When a large carton is filled to its genuine capacity, it delivers the lowest cost per ounce of any side on the menu. But that outcome is never guaranteed. In roughly one out of every three orders, inconsistent packing erodes that mathematical advantage.
If you are ordering at full counter price, the medium fry remains the safer purchase. Its squat carton design naturally resists hollow packing, giving you a portion that reliably matches corporate benchmarks. If you want the extra fries, order the large through the official mobile app where promotional pricing softens the sting of an under-packed box, or inspect the carton before driving away from the window.
