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Suitcase 55x40x23 – Which Cabin Suitcase Is the Best?

The 55x40x23 cm format is the most widely accepted cabin suitcase size in Europe. We break down 2026 airline rules – Ryanair, Wizz Air, LOT, Lufthansa, easyJet – and test whether the Peli Air 1535 is the best hard-shell carry-on for frequent flyers.