How to determine the size of the case?

The aluminum storage case have many different sizes, usually, there have 18 inches, 20 inches, 21 inches, 23 inches, 26 inches, 27 inches, 29 inches, 30 inches, etc. In general, the most commonly used are 24 inches cases (610 * 420 * 420 mm),  26 inches ( 660 * 490 * 490 mm), 26 inch (735 * 570 * 250 mm). Xinci aluminum cases company can make the size as the demand of the customers. 

How to select sizes?  If the aluminum tool box is too large, it will be high cost, or too small, it will be no enough space to contain the tools. So, you can according to the tools determine the interior dimensions of aluminum tool cases first, then, we can make sure the size.