Item Lookup Codes have a limit of 25 characters. However, Item Lookup Codes of 16 characters and above are unlikely to print correctly on barcode labels. This is due to the barcode which is generated, being too long to fit in the physical space available on the label.
If the barcode is too long, we will print the alias instead, if one is available. Therefore, if you have a barcode that doesn’t print because the Item Lookup Code is too long, you can create a shorter alias and that will form the barcode on the label instead.