If your bag exceeds Ryanair’s strict dimensions (40x20x25cm for a personal item or 55x40x20cm for a 10kg cabin bag) in 2026, you will face hefty gate fees. If a bag is flagged at the boarding gate and does not fit in the "sizer," Ryanair staff will charge a "Gate Bag Fee," which can range from €45 to €75 ($50–$85) depending on the route and how busy the flight is. The bag will then be tagged and placed in the aircraft hold. In 2026, Ryanair has increasingly used automated scanners to check bag sizes during the boarding process. If you realize your bag is too big before arriving at the airport, it is significantly cheaper to log into the Ryanair app and "upgrade" to a checked bag for roughly €20–€35. Abandoning a bag at the gate is not recommended, as Ryanair accepts no responsibility for it, and you may still be liable for a disposal fee. The 2026 mantra for Ryanair flyers remains: "Measure twice, pay once," as the gate penalty often exceeds the original cost of the flight.