How to Set Up Code 128 Barcodes for a Small Warehouse — What I Learned at Amazon

I configured barcode systems for three different Amazon facilities over 12 years. Every time I walk into a small warehouse now, I see the same mistakes I saw new associates make in their first week.

Here is what actually matters for a small warehouse barcode setup:

1. Pick Code 128, not Code 39

Code 128 packs alphanumeric data at higher density. A 12-character bin location label in Code 39 takes 40% more label space than the same data in Code 128. When you have 2,000 bin locations, that space adds up fast.

2. Bar width = 3 dots at 203 DPI