ForgeBox sizes are grouped by Stack Code so compatible boxes share the same footprint. Match the code while building your order to create a cleaner, more organized storage system.
Some ForgeBox sizes share the same footprint. Those sizes are grouped together under a Stack Code. If two boxes share the same Stack Code, they're designed to stack together. That's it.
When choosing your box size in the ForgeBox builder, the Stack Code will be shown beside the size option. Match codes when you want different boxes to stack together.