Granite Tile & Slabs FAQ - Learning CenterLearning Center A. Usually, the minimum average size of a granite slab is 105″ x 54″. Thicknesses can also be 3/4″ or 1-1/4″. The granite slabs are packed in bundles of approximately 400 to 450 square feet. Each bundle includes approx. 8 to 10 granite slabs. Each bundle weighs 2.6 tons, or 5,700 pounds.