A bag measuring 45 x 36 x 20 cm is specifically designed to fit the maximum "free under-seat cabin bag" dimensions for easyJet. In 2026, easyJet is one of the most popular low-cost carriers in Europe, and their policy allows every passenger to bring one small cabin bag for free, provided it fits under the seat in front of them. Several luggage brands have created "easyJet-specific" backpacks and small trolley cases to maximize this exact volume (32.4 Liters). For example, the Cabin Max Manhattan or the Vueling/easyJet 45cm Backpack are designed to meet these specs perfectly. It is important to note that these dimensions are slightly larger than Ryanair’s free bag limit (40x20x25cm) but smaller than the standard overhead bin size for airlines like British Airways or Delta. If you use a bag of this size, you are essentially "guaranteed" to never have your bag gate-checked, and you avoid the increasingly high fees for overhead bin access. Always ensure that the wheels and handles are included in your measurements, as easyJet gate agents frequently use metal sizers to verify these exact 45x36x20cm constraints.