OPTIONAL

You can set your box sizes here. Each box size can be given a name.
You can set the outer and inner dimensions of each box.
You can also account for the weight of the box itself before putting any items in it using the “Empty Weight” column.
“Max Weight” is the maximum allowable weight for this box. If this weight is exceeded, a different box will be used, or the order will be split into multiple boxes. This depends on your settings.

Additionally, you can set which specific shipping methods this box may be used for. Default is “All” and will work for any shipping method. Leaving them all unchecked will allow all shipping methods to work with this box.

You may also set a specific origin zip code for this box. This is useful if for example you have a vendor/warehouse who ships from a specific location and uses a specific box size not used from your other shipping origins.

Lastly, you can also specify if this box only applies when a specific shipping carrier is used. Leaving them all unchecked will allow all carriers to work with this box.