What does 64 linear inches mean?

What does this mean? The linear dimensions, or total linear length, of your luggage are the sum total of the length, width, and height of your suitcase. This number may not exceed the Maximum Linear Dimensions allowed by your airline, typically 62 inches (158cm) for most airlines.



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For example, if your bag is 24 inches tall, 20 inches long and 18 inches wide, its total linear length is 62 inches. Note that using modern spinner bags, which include four wheels on the bottom of your suitcase, means you'll have less space within your actual bag.

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If your checked bag is over 62 linear inches (157 cm), it will be marked as oversized. This is a rule set by airline regulators to protect baggage handlers from any potential injuries. You'll need to pay a hefty fee for oversized baggage, which usually ranges between 75-200$.

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A medium checked suitcase (25-27 inches) is more than enough for most people. Usually, medium checked suitcases are 58-61 linear inches in size, which is just below the 62 linear inch size limit, so when you're looking for a checked suitcase, get one in this size.

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Most airlines seem to have a 62 linear limit (L x W x D) on checked luggage before incurring additional fees. Suitcases seem to be sold in 20, 24, and 28 sizes. The 28 bag comes the closest to the 62 limit but almost every 28 bag I've looked at had linear measurements of between 64-65.

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Checked bags come in all shapes and sizes and the chances a check in agent will get out a tape measure, measure each dimension and add them up are slim to non-existent. And a 64 linear inch checked bag would be indistinguishable from the regulation 62. That's as long as it is 64, and not 67 or 70.

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For example, if your bag measures 24 inches long, 18 inches wide, and 20 inches high, its linear inches would be 62 (24+18+20=62). So, when airlines refer to a 62 linear inch limit, they are saying that the combined length, width, and height of your checked luggage cannot exceed 62 inches.

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In general, if you're bag is not within the size restrictions at the check-in counter, different airlines will charge you a late check-in fee.

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Most domestic airlines publish checked baggage size limits as a single dimension: 62 linear inches total. International airlines vary slightly, but the 62-inch rule is the most common standard worldwide. Bags larger than 62 linear inches can still fly, but they may be subject to additional fees.

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Most domestic airlines anyway have a linear size limit for checked baggage of 62 inches overall, meaning length+width+height. So one length of 32 inches won't put you over the limit if the width and depth keep you under 62 inches total.

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Most domestic airlines publish checked baggage size limits as a single dimension: 62 linear inches total. International airlines vary slightly, but the 62-inch rule is the most common standard worldwide. Bags larger than 62 linear inches can still fly, but they may be subject to additional fees.

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What does this mean? The linear dimensions, or total linear length, of your luggage are the sum total of the length, width, and height of your suitcase. This number may not exceed the Maximum Linear Dimensions allowed by your airline, typically 62 inches (158cm) for most airlines.

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While some airlines, primarily Southwest and Spirit Airlines, will allow a bag up to 50 linear inches, it's best to go for one that is around 45 linear inches or less.

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You should check with your airline first, but most domestic airlines permit a carry-on piece of luggage that is 45 linear (total) inches. A common sized bag for carry-on luggage is 22x 14x 9. Most airlines have a carry-on weight limit of 40 pounds.

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A lot of manufacturers advertise their 28-32 inch suitcases as checked luggage. However, technically, that's false advertising. The truth is that a large portion of 28, 29, 30, 31, and 32-inch suitcases are over the size limits for checked bags, so they can't be used as checked bags.

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Measuring the size of your luggage isn't tricky. Most airlines require that your bag be 62 linear inches or less. Therefore, your bag's length, width and height cannot exceed 62 inches. This measurement includes the wheels and the handle of your luggage.

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Summing Up: Measuring Luggage For Air Travel
But there really isn't that much to it. You just need to measure the height, width, and depth of your bag using the good old tape measure, and make sure that it's below the size limit for your airline.

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Conclusion. So while 29-inch suitcases will be permitted by most airlines depending on their size and weight limits, other carriers may not permit them at all — so always check with your airline before flying to avoid any unnecessary delays or fees at the airport gate.

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Don't forget to include the wheels, handles, and anything else that's “sticking out”. You should always measure each dimension at the widest point, not the narrowest. For example, the Samsonite Winfield 2 28-inch checked suitcase has the total overall dimensions of 31 (height) x 20 (width) x 12.75 (depth) inches.

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