A single large box can cost more to ship than you expect. Sometimes much more. If you ship big or bulky items with UPS or FedEx, you have probably seen oversize package fees on your invoice. These charges can add hundreds of dollars to a single package. And because they are buried in long invoices, many businesses don’t notice them until the costs have piled up. Quick answer: UPS and FedEx add an oversize fee when a package is longer than 96 inches, or when its length plus gi