Remove the bones from a Wagyu Rib Roast and you have a slab of Wagyu Beef Back Ribs. A slab of back ribs contains seven bones and feeds 2-3 people. If you enjoy eating meat off a bone, this is a perfect item for you. Ideal for smoking or roasting, the meat in between the bones has exquisite flavor. An average slab weighs around 5 lbs.