Because of the wide variation in hand/carry-on luggage limits, in 2015 IATA released a size recommendation for suitcases meant as hand/carry-on luggage. These state that suitcases should have a maximum size of 55 cm (21.65 in) long, 35 cm (13.78 in) wide and 20 cm (7.87 in) deep. If they meet these requirements, the bag may carry the logo "IATA cabin OK".[1] This limit is tighter than most current airline limits, so bags with this logo are practically allowed everywhere.