Checked LuggageThe most common maximum size bag allowed is 62 linear (total) inches. A common size bag for checking through is: 27" x 21" x 14". Airline carriers will allow overweight, oversize or additional baggage for additional fees.
Do airlines care about checked bag size?
Checked bag dimensionsAlthough checked bags can be larger than carry-on bags, they also have maximum allowed weights and dimensions. Typically, airlines allow checked bags that weigh up to 50 pounds and whose dimensions (length + width + height) are 62 inches or less.