If your business relies on custom packaging with varying dimensions and you know you may be affected by DIM weights, we recommend creating custom package types.
Follow the steps below to add your custom packaging to ShipStation:
Click Create a new package.
Name your new package type and define its dimensions.
Click Save Changes.
You can edit or delete the custom packages using the Edit or Delete buttons.
Now that you have set up custom package types, apply your custom packaging to an order.