Our Canada Post 2.0 API does not allow for custom product or box size. The module takes into account product weight and default box size to calculate the shipping rate. The product weight can be set on the product edit page. *Note the weight must be greater than 0.The default box size can be set in System > Configuration > Shipping Methods > Canada Post v2Default HeightDefault WidthDefault LengthFor the box size, we recommend your most popular box size.
Be sure to browse our E-commerce Questions Section (FAQs), before opening a ticket.
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