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Which carry-ons fit 55 x 40 x 23 cm?
Quick answerOnly 3 of 28 carry-ons with wheels-included listing sizes meet 55 x 40 x 23 cm, and 2 meet Air France and KLM's 55 x 35 x 25 cm. A bag built to the US 22 inch height is 55.9 cm tall, so it fails every 55 cm limit before width or depth are even checked.
Limits change; confirm with your airline before you fly. Every figure here links to the airline page it came from.
Every size is converted from inches at 2.54 cm per inch and compared in centimetres, the unit these airlines publish, with no rounding in the bag's favour.
Buy to the chart
A spread across the price range, so the premium options are not hidden behind the cheapest ones.

LOVEVOOK 40L Travel Backpack Flight Approved Carry on Backpack,3 Packing
18 x 14 x 8 in as listed$43.99Check price
$79.99Check price
Cabin Zero Cabinzero Cabinzero 'Classic 44l' Unisex Backpack
21.7 x 15.7 x 7.9 in as listed, 1.68 lb$135.85Check price
$413.99Check price
Researched, not professional advice. Airline limits change without notice; each figure links to the page it came from and shows the year it was checked.