How big are the 20l and 30l backpacks?

20l and 30l backpacks are generally 450-550mm high, 300mm wide and 150-200 thick. It is equivalent to the size of a half-unfolded arm, and it is enough to carry 20l and 30l backpacks every day.

The size of the backpack has several key dimensions, such as the width and length of the bottom of the backpack and the height of the backpack, as well as the size of the inner interlayer of the backpack lining. In addition, the size of a backpack is often expressed in terms of capacity.

Approximate size of backpack:

The capacity of common backpacks is 30L, 40L, 50L, 60L, and 40L is enough for daily use. If it is used for long-distance travel, it is best to choose a backpack over 60L.

Airlines have size requirements for carry-on backpacks, which must meet the boarding size before they can be taken on the plane. But now the implementation standards of different airlines are different, but backpacks need to be checked if they exceed the standard.

Generally speaking, the length, width and height of backpacks are less than 55CM(2 1 inch), 40CM( 15 inch) and 20CM(7 inch) respectively, and the capacity is less than 44L, which is basically within the allowable range of boarding.