KLM's cabin bag allowance is 55x25x35cm for hand luggage that goes in the overhead locker. It's a fairly generous European standard, and Flight Knight has a good range of cases that fit comfortably within those dimensions.

Worth knowing: KLM includes a cabin bag with most economy fares, though the exact allowance can vary depending on your ticket type and destination. Always worth double-checking when you book.

The sizes compatible with KLM's allowance give you a decent amount of packing space - enough for a long weekend or a week-long business trip if you pack efficiently. Flight Knight's range in this size bracket is lightweight and hard-wearing, which matters when you're flying regularly.