Yes, small backpacks are allowed in Universal Studios (both Orlando and Hollywood), but they are subject to mandatory x-ray and/or physical inspection at the security hub before you enter CityWalk or the parks. In 2026, the size limit for bags brought into the parks is generally 24" long x 15" wide x 18" high. While you can carry your backpack throughout the park, many of Universal's "high-thrill" attractions (like VelociCoaster, Hulk, and Harry Potter and the Forbidden Journey) have a strict no-loose-items policy, meaning you cannot take your backpack on the ride. Universal provides complimentary lockers near these attractions for the duration of your ride time. These small lockers are free for a window based on the current wait time, while larger lockers for jumbo backpacks require a small fee. For "standard" family rides or shows, you can simply keep your backpack at your feet. It is highly recommended to use a small, lightweight bag to speed up the security process and ensure your items fit into the free lockers without needing to pay for the oversized units.