It’s been over a year now since UPS and FedEx began charging by size, not just by weight.  Before the price increase, any ground shipment of a packaging size less than 3 feet was charged by weight only.  Since the price increase, all packages will be priced via dimensional weight. Historically, shipping costs have been calculated on the basis of gross weight.   But by charging only based on weight, large lightweight sized packages became unprofitable for freight carriers. These large, lightweight boxes would take up…