When choosing a bag for a day at Disney in 2026, the primary constraint is the official size limit: bags must be no larger than 24" long x 15" wide x 18" high (61 cm x 38 cm x 46 cm). For most guests, a small-to-medium backpack or a crossbody "sling" bag is the ideal choice. Mini backpacks (like the popular Loungefly brand) are a fan favorite because they are stylish and large enough for essentials like a phone, power bank, and sunscreen without being bulky on rides. If you are traveling with children, a standard-sized school backpack is usually sufficient to hold extra clothes, snacks, and diapers. Many "pro" park-goers prefer sling bags worn across the chest, as they allow for quick access to your phone for mobile ordering and Genie+ selections while keeping your hands free. It is best to avoid overly large or heavy bags, as you will be carrying them for 10–12 hours and walking several miles. Look for bags with padded straps and water-resistant materials, as afternoon rain showers are common and you will want to keep your electronics dry during water rides.