UPS and FedEx are both now using "dimensional weight," a made-up quantity that depends on the size of the package, not just its actual weight, to determine pricing, even for ground shipments. USPS often charges by dimensional weight as well. So to quote accurate shipping costs, your shop needs to know the size of the shipping box. That's easy if you always use just one standard shipping carton, but most merchants use a variety of shapes and sizes.
Boxify is an embedded app for Shopify shops that provides a solution to this thorny problem. Use it to record the dimensions of your products and shipping boxes. Then when a customer checks out from your shop, Boxify calculates how the order is to be packed and queries UPS, FedEx, and USPS using the weight and dimensions of the box or boxes you will ship the order in. This allows your shop to quote accurate shipping charges, including negotiated rates if available.
No more having to pad shipping costs to protect yourself or worrying that inflated shipping costs are scaring off customers.
Boxify also shows your packers which of your available shipping boxes to use and how each of the items in an order should be placed in that box. This ensures that your orders will always go out in the smallest box possible, saving you money on shipping and being kinder to the environment to boot.