The keg is about 9" x 23" so I estimated the box at 25" x 12" x 12" at 10 pounds and FedEx home delivery is $17.16, according to their detailed quote request. This also included a declared value of $50.00.
USPS standard shipping was $20.30 and that didn't give me an option to choose insurance yet, which I would want insurance and tracking to you.
I usually ship FedEx and with my account that could be why it is cheaper but that's the price.