5. How many characters can fit into a barcode?

Depending on the specific barcode type, 1D barcodes can have from 20-25 characters while 2D codes can go up to 2,000 characters. Therefore, the concern is that as you increase the amount of information in the barcode the bigger it will become. Because this is especially the case with 1D barcodes, most people encode 8-15 characters.