A small to medium-sized suitcase with a capacity of 40-60 liters should work for a 15kg limit. Go for a medium-sized suitcase with a capacity of 60-80 liters if you have a limit of 22kg.

For a 22kg (approx. 48.5 lbs) weight limit, which is the standard for airlines like Jet2 or TUI, you need a Medium to Large suitcase, typically in the 65cm to 75cm (26–29 inch) range. A suitcase with a capacity of 70 to 90 liters is the "sweet spot" for 22kg; any larger, and the weight of the suitcase itself (often 4–5kg) will eat too much into your allowance. A peer-to-peer "pro" tip: always use a digital luggage scale before you leave for the airport, as "eye-balling" 22kg is a high-risk gamble that often leads to $100+ overage fees. If you're packing heavy items like shoes or books, a 65cm "Medium" bag is better to prevent overpacking. For a 2026 traveler, choosing a high-value polycarbonate hard-shell bag is recommended, as it provides the best protection for your items while staying light enough to maximize your actual "clothing-to-plastic" ratio, ensuring you don't waste your precious 22kg on the weight of the bag itself.