In a surprise move to shake up the world of e-commerce FedEx is raising prices on more than a third of its ground shipments. The new 'dimensional weight pricing' rates will increase shipping prices up to 40 percent. Instead of charging by weight alone, all packages will now be priced according to size. It isn't clear whether consumers or retailers will pay for the extra shipping charge. The change may curtail free online shipping as extra costs are estimated in the hundreds of millions of dollars.