Speaking of backpacks, do you know what the standard size of backpacks is? In fact, there is no size standard for backpacks, but there are different sizes. Backpacks for different purposes often have different sizes and specifications. When purchasing a custom backpack, size is an important factor to consider. If the size is too large or too small, it will affect the use. Therefore, you should choose the appropriate size according to the actual use.

Under normal circumstances, the size of the backpack has several most critical dimensions, such as the width and length of the bottom of the backpack, the height of the backpack, and the size of the interlayer inside the lining of the backpack. In addition, the size of the backpack is often expressed in terms of capacity. Common backpacks have a capacity of 30L, 40L, 50L, and 60L. About 40L is enough for daily use. If you use it for long-distance travel, it is best to choose a backpack with a capacity of more than 60L.

It is worth noting that airlines have size requirements for carry-on backpacks, which must meet the boarding size before they can be carried on the plane. However, now each airline has different implementation standards, but if the backpack exceeds the standard, it needs to be checked. Generally speaking, the length, width, and height of a backpack should not exceed 55CM (21 inches), 40CM (15 inches), and 20CM (7 inches), respectively, and the capacity should not exceed 44L, which is basically within the allowable range for boarding.